82866864 has 40 divisors (see below), whose sum is σ = 216204912. Its totient is φ = 27347200.

The previous prime is 82866859. The next prime is 82866877. The reversal of 82866864 is 46866828.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a nude number because it is divisible by every one of its digits.

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, 3699 + ... + 13394.

Almost surely, 2^82866864 is an apocalyptic number.

It is an amenable number.

82866864 is an abundant number, since it is smaller than the sum of its proper divisors (133338048).

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

82866864 is a wasteful number, since it uses less digits than its factorization.

82866864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17205 (or 17199 counting only the distinct ones).

The product of its digits is 884736, while the sum is 48.

The square root of 82866864 is about 9103.1238594232. The cubic root of 82866864 is about 435.9737099430.

The spelling of 82866864 in words is "eighty-two million, eight hundred sixty-six thousand, eight hundred sixty-four".