865612224 has 56 divisors (see below), whose sum is σ = 2544744720. Its totient is φ = 288536832.

The previous prime is 865612219. The next prime is 865612261. The reversal of 865612224 is 422216568.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 248739 + ... + 252194.

It is an arithmetic number, because the mean of its divisors is an integer number (45441870).

Almost surely, 2^865612224 is an apocalyptic number.

It is an amenable number.

865612224 is an abundant number, since it is smaller than the sum of its proper divisors (1679132496).

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

865612224 is a wasteful number, since it uses less digits than its factorization.

865612224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500954 (or 500938 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 865612224 is about 29421.2886189575. The cubic root of 865612224 is about 953.0326811510.

It can be divided in two parts, 865 and 612224, that added together give a square (613089 = 783²).

The spelling of 865612224 in words is "eight hundred sixty-five million, six hundred twelve thousand, two hundred twenty-four".