81482912 has 48 divisors (see below), whose sum is σ = 184726080. Its totient is φ = 34656768.

The previous prime is 81482903. The next prime is 81482939. The reversal of 81482912 is 21928418.

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, 29828 + ... + 32444.

It is an arithmetic number, because the mean of its divisors is an integer number (3848460).

Almost surely, 2^81482912 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 81482912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92363040).

81482912 is an abundant number, since it is smaller than the sum of its proper divisors (103243168).

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

81482912 is a wasteful number, since it uses less digits than its factorization.

81482912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773 (or 2765 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 81482912 is about 9026.7885762324. The cubic root of 81482912 is about 433.5330193419.

The spelling of 81482912 in words is "eighty-one million, four hundred eighty-two thousand, nine hundred twelve".