8638894520 has 32 divisors (see below), whose sum is σ = 19441198800. Its totient is φ = 3454902528.

The previous prime is 8638894487. The next prime is 8638894547. The reversal of 8638894520 is 254988368.

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 231311 + ... + 266049.

Almost surely, 2^8638894520 is an apocalyptic number.

It is an amenable number.

8638894520 is an abundant number, since it is smaller than the sum of its proper divisors (10802304280).

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

8638894520 is a wasteful number, since it uses less digits than its factorization.

8638894520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40967 (or 40963 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 53.

The square root of 8638894520 is about 92945.6535831558. The cubic root of 8638894520 is about 2051.8836163436.

The spelling of 8638894520 in words is "eight billion, six hundred thirty-eight million, eight hundred ninety-four thousand, five hundred twenty".