620683904 has 32 divisors (see below), whose sum is σ = 1240274100. Its totient is φ = 309399552.

The previous prime is 620683873. The next prime is 620683907. The reversal of 620683904 is 409386026.

It can be written as a sum of positive squares in 2 ways, for example, as 587965504 + 32718400 = 24248^2 + 5720^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (620683907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35942 + ... + 50330.

Almost surely, 2^620683904 is an apocalyptic number.

620683904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

620683904 is a deficient number, since it is larger than the sum of its proper divisors (619590196).

620683904 is a wasteful number, since it uses less digits than its factorization.

620683904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740 (or 14728 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 620683904 is about 24913.5285337104. The cubic root of 620683904 is about 853.0153133528.

The spelling of 620683904 in words is "six hundred twenty million, six hundred eighty-three thousand, nine hundred four".