864857088 has 110 divisors (see below), whose sum is σ = 2582880036. Its totient is φ = 288258048.

The previous prime is 864857083. The next prime is 864857093. The reversal of 864857088 is 880758468.

864857088 is a `hidden beast` number, since 8 + 64 + 8 + 570 + 8 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (864857083) and next prime (864857093).

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 (864857083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 77731 + ... + 88157.

Almost surely, 2^864857088 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 864857088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1291440018).

864857088 is an abundant number, since it is smaller than the sum of its proper divisors (1718022948).

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

864857088 is a wasteful number, since it uses less digits than its factorization.

864857088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10459 (or 10432 counting only the distinct ones).

The product of its (nonzero) digits is 3440640, while the sum is 54.

The square root of 864857088 is about 29408.4526624574. The cubic root of 864857088 is about 952.7554674667.

The spelling of 864857088 in words is "eight hundred sixty-four million, eight hundred fifty-seven thousand, eighty-eight".