82638556 has 48 divisors (see below), whose sum is σ = 194181120. Its totient is φ = 29718720.

The previous prime is 82638553. The next prime is 82638557. The reversal of 82638556 is 65583628.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82638553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6316 + ... + 14323.

It is an arithmetic number, because the mean of its divisors is an integer number (4045440).

Almost surely, 2^82638556 is an apocalyptic number.

It is an amenable number.

82638556 is an abundant number, since it is smaller than the sum of its proper divisors (111542564).

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

82638556 is a wasteful number, since it uses less digits than its factorization.

82638556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20674 (or 20672 counting only the distinct ones).

The product of its digits is 345600, while the sum is 43.

The square root of 82638556 is about 9090.5751193200. The cubic root of 82638556 is about 435.5729553167.

The spelling of 82638556 in words is "eighty-two million, six hundred thirty-eight thousand, five hundred fifty-six".