82156388 has 24 divisors (see below), whose sum is σ = 146694240. Its totient is φ = 40252160.

The previous prime is 82156369. The next prime is 82156397. The reversal of 82156388 is 88365128.

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, 42548 + ... + 44436.

It is an arithmetic number, because the mean of its divisors is an integer number (6112260).

Almost surely, 2^82156388 is an apocalyptic number.

It is an amenable number.

82156388 is a deficient number, since it is larger than the sum of its proper divisors (64537852).

82156388 is a wasteful number, since it uses less digits than its factorization.

82156388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2107 (or 2105 counting only the distinct ones).

The product of its digits is 92160, while the sum is 41.

The square root of 82156388 is about 9064.0161076644. The cubic root of 82156388 is about 434.7241621140.

The spelling of 82156388 in words is "eighty-two million, one hundred fifty-six thousand, three hundred eighty-eight".