620939064 has 16 divisors (see below), whose sum is σ = 1552347720. Its totient is φ = 206979680.

The previous prime is 620939063. The next prime is 620939071. The reversal of 620939064 is 460939026.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (620939063) 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, 12936207 + ... + 12936254.

Almost surely, 2^620939064 is an apocalyptic number.

It is an amenable number.

620939064 is an abundant number, since it is smaller than the sum of its proper divisors (931408656).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620939064 is a wasteful number, since it uses less digits than its factorization.

620939064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25872470 (or 25872466 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 39.

The square root of 620939064 is about 24918.6489200358. The cubic root of 620939064 is about 853.1321874262.

The spelling of 620939064 in words is "six hundred twenty million, nine hundred thirty-nine thousand, sixty-four".