864244040 has 64 divisors (see below), whose sum is σ = 2189790720. Its totient is φ = 304128000.

The previous prime is 864244033. The next prime is 864244061. The reversal of 864244040 is 40442468.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 864243988 and 864244006.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18041 + ... + 45320.

It is an arithmetic number, because the mean of its divisors is an integer number (34215480).

Almost surely, 2^864244040 is an apocalyptic number.

It is an amenable number.

864244040 is an abundant number, since it is smaller than the sum of its proper divisors (1325546680).

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

864244040 is a wasteful number, since it uses less digits than its factorization.

864244040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63414 (or 63410 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 864244040 is about 29398.0278250089. The cubic root of 864244040 is about 952.5302962007.

The spelling of 864244040 in words is "eight hundred sixty-four million, two hundred forty-four thousand, forty".