865107264 has 56 divisors (see below), whose sum is σ = 2615923648. Its totient is φ = 247173120.

The previous prime is 865107263. The next prime is 865107281. The reversal of 865107264 is 462701568.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865107263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 320497 + ... + 323184.

Almost surely, 2^865107264 is an apocalyptic number.

865107264 is a gapful number since it is divisible by the number (84) formed by its first and last digit.

It is an amenable number.

865107264 is an abundant number, since it is smaller than the sum of its proper divisors (1750816384).

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

865107264 is a wasteful number, since it uses less digits than its factorization.

865107264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 643703 (or 643693 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 865107264 is about 29412.7058258842. The cubic root of 865107264 is about 952.8473260238.

The spelling of 865107264 in words is "eight hundred sixty-five million, one hundred seven thousand, two hundred sixty-four".