865508916 has 12 divisors (see below), whose sum is σ = 2019520832. Its totient is φ = 288502968.

The previous prime is 865508899. The next prime is 865508927. The reversal of 865508916 is 619805568.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

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, 36062860 + ... + 36062883.

Almost surely, 2^865508916 is an apocalyptic number.

It is an amenable number.

865508916 is an abundant number, since it is smaller than the sum of its proper divisors (1154011916).

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

865508916 is a wasteful number, since it uses less digits than its factorization.

865508916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72125750 (or 72125748 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 48.

The square root of 865508916 is about 29419.5328990791. The cubic root of 865508916 is about 952.9947658603.

The spelling of 865508916 in words is "eight hundred sixty-five million, five hundred eight thousand, nine hundred sixteen".