620389 has 12 divisors (see below), whose sum is σ = 787968. Its totient is φ = 483000.

The previous prime is 620383. The next prime is 620393. The reversal of 620389 is 983026.

620389 = T₁₃₄ + T₁₃₅ + ... + T₁₈₂.

It is not a de Polignac number, because 620389 - 2⁷ = 620261 is a prime.

It is a super-2 number, since 2×620389² = 769765022642, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 37 + ... + 1114.

It is an arithmetic number, because the mean of its divisors is an integer number (65664).

2⁶²⁰³⁸⁹ is an apocalyptic number.

It is an amenable number.

620389 is a deficient number, since it is larger than the sum of its proper divisors (167579).

620389 is a wasteful number, since it uses less digits than its factorization.

620389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 620389 is about 787.6477639148. The cubic root of 620389 is about 85.2880194936.

The spelling of 620389 in words is "six hundred twenty thousand, three hundred eighty-nine".