81798304 has 48 divisors (see below), whose sum is σ = 192060288. Its totient is φ = 33530112.

The previous prime is 81798293. The next prime is 81798313. The reversal of 81798304 is 40389718.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2787 + ... + 13090.

It is an arithmetic number, because the mean of its divisors is an integer number (4001256).

Almost surely, 2^81798304 is an apocalyptic number.

It is an amenable number.

81798304 is an abundant number, since it is smaller than the sum of its proper divisors (110261984).

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

81798304 is a wasteful number, since it uses less digits than its factorization.

81798304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15917 (or 15909 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 81798304 is about 9044.2414828442. The cubic root of 81798304 is about 434.0916510270.

The spelling of 81798304 in words is "eighty-one million, seven hundred ninety-eight thousand, three hundred four".