8765328638 has 64 divisors (see below), whose sum is σ = 15133713408. Its totient is φ = 3771573120.

The previous prime is 8765328629. The next prime is 8765328697. The reversal of 8765328638 is 8368235678.

8765328638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×8765328638² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7536245 + ... + 7537407.

It is an arithmetic number, because the mean of its divisors is an integer number (236464272).

Almost surely, 2^8765328638 is an apocalyptic number.

8765328638 is a deficient number, since it is larger than the sum of its proper divisors (6368384770).

8765328638 is a wasteful number, since it uses less digits than its factorization.

8765328638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1457.

The product of its digits is 11612160, while the sum is 56.

The square root of 8765328638 is about 93623.3338329714. Note that the first 3 decimals coincide. The cubic root of 8765328638 is about 2061.8452563073.

The spelling of 8765328638 in words is "eight billion, seven hundred sixty-five million, three hundred twenty-eight thousand, six hundred thirty-eight".