865019968 has 28 divisors (see below), whose sum is σ = 1758395772. Its totient is φ = 421959680.

The previous prime is 865019951. The next prime is 865019983. The reversal of 865019968 is 869910568.

It can be written as a sum of positive squares in 2 ways, for example, as 118200384 + 746819584 = 10872^2 + 27328^2 .

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, 162205 + ... + 167452.

It is an arithmetic number, because the mean of its divisors is an integer number (62799849).

Almost surely, 2^865019968 is an apocalyptic number.

It is an amenable number.

865019968 is an abundant number, since it is smaller than the sum of its proper divisors (893375804).

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

865019968 is a wasteful number, since it uses less digits than its factorization.

865019968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329710 (or 329700 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 52.

The square root of 865019968 is about 29411.2218039306. The cubic root of 865019968 is about 952.8152750625.

It can be divided in two parts, 86501 and 9968, that added together give a palindrome (96469).

The spelling of 865019968 in words is "eight hundred sixty-five million, nineteen thousand, nine hundred sixty-eight".