82931380 has 24 divisors (see below), whose sum is σ = 199035648. Its totient is φ = 28433568.

The previous prime is 82931369. The next prime is 82931383. The reversal of 82931380 is 8313928.

It is a super-2 number, since 2×82931380² = 13755227577408800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82931383) 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, 296044 + ... + 296323.

It is an arithmetic number, because the mean of its divisors is an integer number (8293152).

Almost surely, 2^82931380 is an apocalyptic number.

It is an amenable number.

82931380 is an abundant number, since it is smaller than the sum of its proper divisors (116104268).

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

82931380 is a wasteful number, since it uses less digits than its factorization.

82931380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 592383 (or 592381 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 82931380 is about 9106.6667886774. Note that the first 3 decimals coincide. The cubic root of 82931380 is about 436.0868230426.

The spelling of 82931380 in words is "eighty-two million, nine hundred thirty-one thousand, three hundred eighty".