81792932 has 24 divisors (see below), whose sum is σ = 154598136. Its totient is φ = 37640448.

The previous prime is 81792917. The next prime is 81792941. The reversal of 81792932 is 23929718.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14945956 + 66846976 = 3866^2 + 8176^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 81792932.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17288 + ... + 21504.

It is an arithmetic number, because the mean of its divisors is an integer number (6441589).

Almost surely, 2^81792932 is an apocalyptic number.

It is an amenable number.

81792932 is a deficient number, since it is larger than the sum of its proper divisors (72805204).

81792932 is a wasteful number, since it uses less digits than its factorization.

81792932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4607 (or 4605 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 81792932 is about 9043.9444934166. The cubic root of 81792932 is about 434.0821480126.

It can be divided in two parts, 8179 and 2932, that added together give a palindrome (11111).

The spelling of 81792932 in words is "eighty-one million, seven hundred ninety-two thousand, nine hundred thirty-two".