864386500 has 24 divisors (see below), whose sum is σ = 1887821208. Its totient is φ = 345754400.

The previous prime is 864386491. The next prime is 864386507. The reversal of 864386500 is 5683468.

It can be written as a sum of positive squares in 4 ways, for example, as 168376576 + 696009924 = 12976^2 + 26382^2 .

It is not an unprimeable number, because it can be changed into a prime (864386507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 863887 + ... + 864886.

It is an arithmetic number, because the mean of its divisors is an integer number (78659217).

Almost surely, 2^864386500 is an apocalyptic number.

It is an amenable number.

864386500 is an abundant number, since it is smaller than the sum of its proper divisors (1023434708).

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

864386500 is a wasteful number, since it uses less digits than its factorization.

864386500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728792 (or 1728780 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The square root of 864386500 is about 29400.4506768179. The cubic root of 864386500 is about 952.5826309597.

The spelling of 864386500 in words is "eight hundred sixty-four million, three hundred eighty-six thousand, five hundred".