8638909632 has 112 divisors (see below), whose sum is σ = 25439339520. Its totient is φ = 2874813696.

The previous prime is 8638909621. The next prime is 8638909637. The reversal of 8638909632 is 2369098368.

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 (8638909637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1114153 + ... + 1121879.

It is an arithmetic number, because the mean of its divisors is an integer number (227136960).

Almost surely, 2^8638909632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8638909632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12719669760).

8638909632 is an abundant number, since it is smaller than the sum of its proper divisors (16800429888).

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

8638909632 is a wasteful number, since it uses less digits than its factorization.

8638909632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8395 (or 8379 counting only the distinct ones).

The product of its (nonzero) digits is 3359232, while the sum is 54.

The square root of 8638909632 is about 92945.7348779383. The cubic root of 8638909632 is about 2051.8848127948.

The spelling of 8638909632 in words is "eight billion, six hundred thirty-eight million, nine hundred nine thousand, six hundred thirty-two".