8638400924 has 6 divisors (see below), whose sum is σ = 15117201624. Its totient is φ = 4319200460.

The previous prime is 8638400909. The next prime is 8638400929. The reversal of 8638400924 is 4290048368.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8638400929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1079800112 + ... + 1079800119.

It is an arithmetic number, because the mean of its divisors is an integer number (2519533604).

Almost surely, 2^8638400924 is an apocalyptic number.

It is an amenable number.

8638400924 is a deficient number, since it is larger than the sum of its proper divisors (6478800700).

8638400924 is a wasteful number, since it uses less digits than its factorization.

8638400924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2159600235 (or 2159600233 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 44.

The square root of 8638400924 is about 92942.9982516166. The cubic root of 8638400924 is about 2051.8445364655.

The spelling of 8638400924 in words is "eight billion, six hundred thirty-eight million, four hundred thousand, nine hundred twenty-four".