639272004 has 48 divisors (see below), whose sum is σ = 1741006848. Its totient is φ = 178761888.

The previous prime is 639271993. The next prime is 639272017. The reversal of 639272004 is 400272936.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77014 + ... + 84909.

It is an arithmetic number, because the mean of its divisors is an integer number (36270976).

Almost surely, 2^639272004 is an apocalyptic number.

It is an amenable number.

639272004 is an abundant number, since it is smaller than the sum of its proper divisors (1101734844).

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

639272004 is a wasteful number, since it uses less digits than its factorization.

639272004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161984 (or 161982 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 33.

The square root of 639272004 is about 25283.8289030756. The cubic root of 639272004 is about 861.4469979082.

The spelling of 639272004 in words is "six hundred thirty-nine million, two hundred seventy-two thousand, four".