82638636 has 24 divisors (see below), whose sum is σ = 194992560. Its totient is φ = 27236352.

The previous prime is 82638613. The next prime is 82638637. The reversal of 82638636 is 63683628.

It is not an unprimeable number, because it can be changed into a prime (82638637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37621 + ... + 39756.

It is an arithmetic number, because the mean of its divisors is an integer number (8124690).

Almost surely, 2^82638636 is an apocalyptic number.

It is an amenable number.

82638636 is an abundant number, since it is smaller than the sum of its proper divisors (112353924).

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

82638636 is a wasteful number, since it uses less digits than its factorization.

82638636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77473 (or 77471 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The square root of 82638636 is about 9090.5795194806. The cubic root of 82638636 is about 435.5730958718.

The spelling of 82638636 in words is "eighty-two million, six hundred thirty-eight thousand, six hundred thirty-six".