81792504 has 40 divisors (see below), whose sum is σ = 229096560. Its totient is φ = 27263952.

The previous prime is 81792479. The next prime is 81792523. The reversal of 81792504 is 40529718.

81792504 is a `hidden beast` number, since 81 + 79 + 2 + 504 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 62464 + ... + 63759.

It is an arithmetic number, because the mean of its divisors is an integer number (5727414).

Almost surely, 2^81792504 is an apocalyptic number.

It is an amenable number.

81792504 is an abundant number, since it is smaller than the sum of its proper divisors (147304056).

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

81792504 is a wasteful number, since it uses less digits than its factorization.

81792504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126241 (or 126228 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 81792504 is about 9043.9208311440. The cubic root of 81792504 is about 434.0813908669.

The spelling of 81792504 in words is "eighty-one million, seven hundred ninety-two thousand, five hundred four".