82138636 has 12 divisors (see below), whose sum is σ = 144371920. Its totient is φ = 40889520.

The previous prime is 82138627. The next prime is 82138669. The reversal of 82138636 is 63683128.

It is a junction number, because it is equal to n+sod(n) for n = 82138595 and 82138604.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43920 + ... + 45751.

Almost surely, 2^82138636 is an apocalyptic number.

It is an amenable number.

82138636 is a deficient number, since it is larger than the sum of its proper divisors (62233284).

82138636 is a wasteful number, since it uses less digits than its factorization.

82138636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89904 (or 89902 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 82138636 is about 9063.0367978951. The cubic root of 82138636 is about 434.6928487476.

The spelling of 82138636 in words is "eighty-two million, one hundred thirty-eight thousand, six hundred thirty-six".