864647332 has 12 divisors (see below), whose sum is σ = 1533861196. Its totient is φ = 426401280.

The previous prime is 864647327. The next prime is 864647347. The reversal of 864647332 is 233746468.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 189998656 + 674648676 = 13784^2 + 25974^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1480269 + ... + 1480852.

Almost surely, 2^864647332 is an apocalyptic number.

It is an amenable number.

864647332 is a deficient number, since it is larger than the sum of its proper divisors (669213864).

864647332 is a wasteful number, since it uses less digits than its factorization.

864647332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2961198 (or 2961196 counting only the distinct ones).

The product of its digits is 580608, while the sum is 43.

The square root of 864647332 is about 29404.8861926041. The cubic root of 864647332 is about 952.6784364993.

The spelling of 864647332 in words is "eight hundred sixty-four million, six hundred forty-seven thousand, three hundred thirty-two".