82431880 has 32 divisors (see below), whose sum is σ = 195235200. Its totient is φ = 31237056.

The previous prime is 82431863. The next prime is 82431887. The reversal of 82431880 is 8813428.

It is not an unprimeable number, because it can be changed into a prime (82431887) 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, 53472 + ... + 54991.

It is an arithmetic number, because the mean of its divisors is an integer number (6101100).

Almost surely, 2^82431880 is an apocalyptic number.

It is an amenable number.

82431880 is an abundant number, since it is smaller than the sum of its proper divisors (112803320).

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

82431880 is a wasteful number, since it uses less digits than its factorization.

82431880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108493 (or 108489 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 82431880 is about 9079.2004053220. The cubic root of 82431880 is about 435.2095348482.

The spelling of 82431880 in words is "eighty-two million, four hundred thirty-one thousand, eight hundred eighty".