82189864 has 8 divisors (see below), whose sum is σ = 154106010. Its totient is φ = 41094928.

The previous prime is 82189859. The next prime is 82189873. The reversal of 82189864 is 46898128.

It can be written as a sum of positive squares in only one way, i.e., 57608100 + 24581764 = 7590^2 + 4958^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5136859 + ... + 5136874.

Almost surely, 2^82189864 is an apocalyptic number.

It is an amenable number.

82189864 is a deficient number, since it is larger than the sum of its proper divisors (71916146).

82189864 is a wasteful number, since it uses less digits than its factorization.

82189864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10273739 (or 10273735 counting only the distinct ones).

The product of its digits is 221184, while the sum is 46.

The square root of 82189864 is about 9065.8625623820. The cubic root of 82189864 is about 434.7831993163.

The spelling of 82189864 in words is "eighty-two million, one hundred eighty-nine thousand, eight hundred sixty-four".