864242646 has 32 divisors (see below), whose sum is σ = 1767443328. Its totient is φ = 281660160.

The previous prime is 864242597. The next prime is 864242653. The reversal of 864242646 is 646242468.

It is a junction number, because it is equal to n+sod(n) for n = 864242598 and 864242607.

It is a congruent number.

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, 39361 + ... + 57251.

It is an arithmetic number, because the mean of its divisors is an integer number (55232604).

Almost surely, 2^864242646 is an apocalyptic number.

864242646 is an abundant number, since it is smaller than the sum of its proper divisors (903200682).

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

864242646 is a wasteful number, since it uses less digits than its factorization.

864242646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18076.

The product of its digits is 442368, while the sum is 42.

The square root of 864242646 is about 29398.0041159260. The cubic root of 864242646 is about 952.5297840660.

The spelling of 864242646 in words is "eight hundred sixty-four million, two hundred forty-two thousand, six hundred forty-six".