638764482 has 16 divisors (see below), whose sum is σ = 1277851392. Its totient is φ = 212867760.

The previous prime is 638764471. The next prime is 638764499. The reversal of 638764482 is 284467836.

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, 17968 + ... + 40004.

It is an arithmetic number, because the mean of its divisors is an integer number (79865712).

Almost surely, 2^638764482 is an apocalyptic number.

638764482 is an abundant number, since it is smaller than the sum of its proper divisors (639086910).

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

638764482 is a wasteful number, since it uses less digits than its factorization.

638764482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26873.

The product of its digits is 1548288, while the sum is 48.

The square root of 638764482 is about 25273.7904161604. The cubic root of 638764482 is about 861.2189681853.

The spelling of 638764482 in words is "six hundred thirty-eight million, seven hundred sixty-four thousand, four hundred eighty-two".