864538536 has 128 divisors (see below), whose sum is σ = 2405894400. Its totient is φ = 257495040.

The previous prime is 864538523. The next prime is 864538537. The reversal of 864538536 is 635835468.

It is not an unprimeable number, because it can be changed into a prime (864538537) by changing a digit.

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, 1698250 + ... + 1698758.

It is an arithmetic number, because the mean of its divisors is an integer number (18796050).

Almost surely, 2^864538536 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 864538536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202947200).

864538536 is an abundant number, since it is smaller than the sum of its proper divisors (1541355864).

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

864538536 is a wasteful number, since it uses less digits than its factorization.

864538536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739 (or 735 counting only the distinct ones).

The product of its digits is 2073600, while the sum is 48.

The square root of 864538536 is about 29403.0361697563. The cubic root of 864538536 is about 952.6384772593.

The spelling of 864538536 in words is "eight hundred sixty-four million, five hundred thirty-eight thousand, five hundred thirty-six".