628625964 has 12 divisors (see below), whose sum is σ = 1466793944. Its totient is φ = 209541984.

The previous prime is 628625939. The next prime is 628625993. The reversal of 628625964 is 469526826.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×628625964² = 790341205229858592, which contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26192737 + ... + 26192760.

Almost surely, 2^628625964 is an apocalyptic number.

It is an amenable number.

628625964 is an abundant number, since it is smaller than the sum of its proper divisors (838167980).

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

628625964 is a wasteful number, since it uses less digits than its factorization.

628625964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52385504 (or 52385502 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 48.

The square root of 628625964 is about 25072.4144030845. The cubic root of 628625964 is about 856.6382024756.

The spelling of 628625964 in words is "six hundred twenty-eight million, six hundred twenty-five thousand, nine hundred sixty-four".