864643084 has 12 divisors (see below), whose sum is σ = 1554020944. Its totient is φ = 420637104.

The previous prime is 864643081. The next prime is 864643093. The reversal of 864643084 is 480346468.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 864643084.

It is not an unprimeable number, because it can be changed into a prime (864643081) 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, 2920944 + ... + 2921239.

Almost surely, 2^864643084 is an apocalyptic number.

It is an amenable number.

864643084 is a deficient number, since it is larger than the sum of its proper divisors (689377860).

864643084 is a wasteful number, since it uses less digits than its factorization.

864643084 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5842224 (or 5842222 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 43.

The square root of 864643084 is about 29404.8139596223. The cubic root of 864643084 is about 952.6768763316.

The spelling of 864643084 in words is "eight hundred sixty-four million, six hundred forty-three thousand, eighty-four".