81794592 has 72 divisors (see below), whose sum is σ = 253758960. Its totient is φ = 24785280.

The previous prime is 81794579. The next prime is 81794611. The reversal of 81794592 is 29549718.

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9742 + ... + 16077.

It is an arithmetic number, because the mean of its divisors is an integer number (3524430).

Almost surely, 2^81794592 is an apocalyptic number.

It is an amenable number.

81794592 is an abundant number, since it is smaller than the sum of its proper divisors (171964368).

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

81794592 is a wasteful number, since it uses less digits than its factorization.

81794592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25846 (or 25835 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 81794592 is about 9044.0362670657. The cubic root of 81794592 is about 434.0850845804.

The spelling of 81794592 in words is "eighty-one million, seven hundred ninety-four thousand, five hundred ninety-two".