864319772 has 12 divisors (see below), whose sum is σ = 1522577616. Its totient is φ = 429297600.

The previous prime is 864319769. The next prime is 864319777. The reversal of 864319772 is 277913468.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864319777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714893 + ... + 716100.

It is an arithmetic number, because the mean of its divisors is an integer number (126881468).

Almost surely, 2^864319772 is an apocalyptic number.

It is an amenable number.

864319772 is a deficient number, since it is larger than the sum of its proper divisors (658257844).

864319772 is a wasteful number, since it uses less digits than its factorization.

864319772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431148 (or 1431146 counting only the distinct ones).

The product of its digits is 508032, while the sum is 47.

The square root of 864319772 is about 29399.3158423797. The cubic root of 864319772 is about 952.5581181715.

The spelling of 864319772 in words is "eight hundred sixty-four million, three hundred nineteen thousand, seven hundred seventy-two".