Number of the day: 620406

Properties of the number 620406:

620406 = 2 × 3³ × 11489 is the 569762^th composite number and is not squarefree.
620406 has 3 distinct prime factors, 16 divisors, 19 antidivisors and 206784 totatives.
620406 is the sum of 2 positive triangular numbers.
620406 is the difference of 2 positive pentagonal numbers in 2 ways.
620406 = 26² + 149² + 773² is the sum of 3 positive squares.
620406² = 293706² + 546480² is the sum of 2 positive squares in 1 way.
620406² is the sum of 3 positive squares.
620406 is a proper divisor of 5¹⁴⁴ - 1.