82972390 has 16 divisors (see below), whose sum is σ = 152528832. Its totient is φ = 32482624.

The previous prime is 82972369. The next prime is 82972403. The reversal of 82972390 is 9327928.

It is a congruent number.

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, 87799 + ... + 88738.

It is an arithmetic number, because the mean of its divisors is an integer number (9533052).

Almost surely, 2^82972390 is an apocalyptic number.

82972390 is a deficient number, since it is larger than the sum of its proper divisors (69556442).

82972390 is a wasteful number, since it uses less digits than its factorization.

82972390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176591.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 82972390 is about 9108.9181574982. The cubic root of 82972390 is about 436.1586936000.

The spelling of 82972390 in words is "eighty-two million, nine hundred seventy-two thousand, three hundred ninety".