8638684236 has 96 divisors (see below), whose sum is σ = 27565063680. Its totient is φ = 2278331712.

The previous prime is 8638684231. The next prime is 8638684237. The reversal of 8638684236 is 6324868368.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (8638684231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 429666 + ... + 449321.

It is an arithmetic number, because the mean of its divisors is an integer number (287136080).

Almost surely, 2^8638684236 is an apocalyptic number.

It is an amenable number.

8638684236 is an abundant number, since it is smaller than the sum of its proper divisors (18926379444).

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

8638684236 is a wasteful number, since it uses less digits than its factorization.

8638684236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879020 (or 879012 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 54.

The square root of 8638684236 is about 92944.5223560808. The cubic root of 8638684236 is about 2051.8669675392.

The spelling of 8638684236 in words is "eight billion, six hundred thirty-eight million, six hundred eighty-four thousand, two hundred thirty-six".