81794304 has 108 divisors (see below), whose sum is σ = 238510272. Its totient is φ = 26956800.

The previous prime is 81794267. The next prime is 81794333. The reversal of 81794304 is 40349718.

It is a happy number.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 301689 + ... + 301959.

Almost surely, 2^81794304 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81794304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (119255136).

81794304 is an abundant number, since it is smaller than the sum of its proper divisors (156715968).

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

81794304 is a wasteful number, since it uses less digits than its factorization.

81794304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424 (or 407 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 81794304 is about 9044.0203449572. The cubic root of 81794304 is about 434.0845751065.

The spelling of 81794304 in words is "eighty-one million, seven hundred ninety-four thousand, three hundred four".