865339572 has 96 divisors (see below), whose sum is σ = 2216865280. Its totient is φ = 261740160.

The previous prime is 865339561. The next prime is 865339577. The reversal of 865339572 is 275933568.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865339577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 564447 + ... + 565977.

Almost surely, 2^865339572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865339572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1108432640).

865339572 is an abundant number, since it is smaller than the sum of its proper divisors (1351525708).

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

865339572 is a wasteful number, since it uses less digits than its factorization.

865339572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661 (or 1659 counting only the distinct ones).

The product of its digits is 1360800, while the sum is 48.

The square root of 865339572 is about 29416.6546704414. The cubic root of 865339572 is about 952.9326080288.

The spelling of 865339572 in words is "eight hundred sixty-five million, three hundred thirty-nine thousand, five hundred seventy-two".