864260772 has 12 divisors (see below), whose sum is σ = 2016608496. Its totient is φ = 288086920.

The previous prime is 864260759. The next prime is 864260783. The reversal of 864260772 is 277062468.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 36010854 + ... + 36010877.

It is an arithmetic number, because the mean of its divisors is an integer number (168050708).

Almost surely, 2^864260772 is an apocalyptic number.

It is an amenable number.

864260772 is an abundant number, since it is smaller than the sum of its proper divisors (1152347724).

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

864260772 is a wasteful number, since it uses less digits than its factorization.

864260772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72021738 (or 72021736 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 42.

The square root of 864260772 is about 29398.3124005444. The cubic root of 864260772 is about 952.5364432430.

The spelling of 864260772 in words is "eight hundred sixty-four million, two hundred sixty thousand, seven hundred seventy-two".