865344216 has 64 divisors (see below), whose sum is σ = 2362711680. Its totient is φ = 261927680.

The previous prime is 865344191. The next prime is 865344229. The reversal of 865344216 is 612443568.

It is a super-2 number, since 2×865344216² = 1497641224329309312, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 375580 + ... + 377876.

It is an arithmetic number, because the mean of its divisors is an integer number (36917370).

Almost surely, 2^865344216 is an apocalyptic number.

It is an amenable number.

865344216 is an abundant number, since it is smaller than the sum of its proper divisors (1497367464).

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

865344216 is a wasteful number, since it uses less digits than its factorization.

865344216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3744 (or 3740 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 865344216 is about 29416.7336052118. The cubic root of 865344216 is about 952.9343127203.

The spelling of 865344216 in words is "eight hundred sixty-five million, three hundred forty-four thousand, two hundred sixteen".