865015240 has 32 divisors (see below), whose sum is σ = 1970928000. Its totient is φ = 341625024.

The previous prime is 865015237. The next prime is 865015241. The reversal of 865015240 is 42510568.

865015240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (865015241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133710 + ... + 140029.

It is an arithmetic number, because the mean of its divisors is an integer number (61591500).

Almost surely, 2^865015240 is an apocalyptic number.

It is an amenable number.

865015240 is an abundant number, since it is smaller than the sum of its proper divisors (1105912760).

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

865015240 is a wasteful number, since it uses less digits than its factorization.

865015240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273829 (or 273825 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 865015240 is about 29411.1414263371. The cubic root of 865015240 is about 952.8135391030.

The spelling of 865015240 in words is "eight hundred sixty-five million, fifteen thousand, two hundred forty".