81704112 has 40 divisors (see below), whose sum is σ = 241222656. Its totient is φ = 23343936.

The previous prime is 81704099. The next prime is 81704113. The reversal of 81704112 is 21140718.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (81704113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121248 + ... + 121919.

Almost surely, 2^81704112 is an apocalyptic number.

It is an amenable number.

81704112 is an abundant number, since it is smaller than the sum of its proper divisors (159518544).

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

81704112 is a wasteful number, since it uses less digits than its factorization.

81704112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243185 (or 243179 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 81704112 is about 9039.0326916103. The cubic root of 81704112 is about 433.9249659687.

The spelling of 81704112 in words is "eighty-one million, seven hundred four thousand, one hundred twelve".