636080004 has 36 divisors (see below), whose sum is σ = 1837565184. Its totient is φ = 181737072.

The previous prime is 636079993. The next prime is 636080017. The reversal of 636080004 is 400080636.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 636080004.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261812 + ... + 1262315.

Almost surely, 2^636080004 is an apocalyptic number.

It is an amenable number.

636080004 is an abundant number, since it is smaller than the sum of its proper divisors (1201485180).

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

636080004 is a wasteful number, since it uses less digits than its factorization.

636080004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2524144 (or 2524139 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 636080004 is about 25220.6265584343. The cubic root of 636080004 is about 860.0108183243.

The spelling of 636080004 in words is "six hundred thirty-six million, eighty thousand, four".