628664008 has 32 divisors (see below), whose sum is σ = 1354944960. Its totient is φ = 267865920.

The previous prime is 628663993. The next prime is 628664011. The reversal of 628664008 is 800466826.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22758 + ... + 42133.

It is an arithmetic number, because the mean of its divisors is an integer number (42342030).

Almost surely, 2^628664008 is an apocalyptic number.

It is an amenable number.

628664008 is an abundant number, since it is smaller than the sum of its proper divisors (726280952).

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

628664008 is a wasteful number, since it uses less digits than its factorization.

628664008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65077 (or 65073 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The square root of 628664008 is about 25073.1730740248. The cubic root of 628664008 is about 856.6554831736.

The spelling of 628664008 in words is "six hundred twenty-eight million, six hundred sixty-four thousand, eight".