865520224 has 24 divisors (see below), whose sum is σ = 1793678040. Its totient is φ = 409982976.

The previous prime is 865520221. The next prime is 865520267. The reversal of 865520224 is 422025568.

It is a self number, because there is not a number n which added to its sum of digits gives 865520224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865520221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 711169 + ... + 712384.

It is an arithmetic number, because the mean of its divisors is an integer number (74736585).

Almost surely, 2^865520224 is an apocalyptic number.

It is an amenable number.

865520224 is an abundant number, since it is smaller than the sum of its proper divisors (928157816).

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

865520224 is a wasteful number, since it uses less digits than its factorization.

865520224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1423582 (or 1423574 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 865520224 is about 29419.7250836917. The cubic root of 865520224 is about 952.9989161807.

The spelling of 865520224 in words is "eight hundred sixty-five million, five hundred twenty thousand, two hundred twenty-four".