638282512 has 20 divisors (see below), whose sum is σ = 1413340096. Its totient is φ = 273549600.

The previous prime is 638282509. The next prime is 638282549. The reversal of 638282512 is 215282836.

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, 2849364 + ... + 2849587.

Almost surely, 2^638282512 is an apocalyptic number.

It is an amenable number.

638282512 is an abundant number, since it is smaller than the sum of its proper divisors (775057584).

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

638282512 is a wasteful number, since it uses less digits than its factorization.

638282512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698966 (or 5698960 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 638282512 is about 25264.2536402721. The cubic root of 638282512 is about 861.0023071365.

The spelling of 638282512 in words is "six hundred thirty-eight million, two hundred eighty-two thousand, five hundred twelve".