82139392 has 36 divisors (see below), whose sum is σ = 164542000. Its totient is φ = 40923648.

The previous prime is 82139377. The next prime is 82139423. The reversal of 82139392 is 29393128.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

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, 127423 + ... + 128065.

Almost surely, 2^82139392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 82139392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82271000).

82139392 is an abundant number, since it is smaller than the sum of its proper divisors (82402608).

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

82139392 is an equidigital number, since it uses as much as digits as its factorization.

82139392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158 (or 1144 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 82139392 is about 9063.0785056734. The cubic root of 82139392 is about 434.6941823741.

The spelling of 82139392 in words is "eighty-two million, one hundred thirty-nine thousand, three hundred ninety-two".