864660500 has 48 divisors (see below), whose sum is σ = 2060106048. Its totient is φ = 314420000.

The previous prime is 864660431. The next prime is 864660509. The reversal of 864660500 is 5066468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864660509) 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, 73106 + ... + 84105.

It is an arithmetic number, because the mean of its divisors is an integer number (42918876).

Almost surely, 2^864660500 is an apocalyptic number.

It is an amenable number.

864660500 is an abundant number, since it is smaller than the sum of its proper divisors (1195445548).

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

864660500 is a wasteful number, since it uses less digits than its factorization.

864660500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157241 (or 157229 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 864660500 is about 29405.1101001170. The cubic root of 864660500 is about 952.6832726930.

The spelling of 864660500 in words is "eight hundred sixty-four million, six hundred sixty thousand, five hundred".