81459882 has 48 divisors (see below), whose sum is σ = 210487680. Its totient is φ = 22261536.

The previous prime is 81459877. The next prime is 81459901. The reversal of 81459882 is 28895418.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11157 + ... + 16952.

It is an arithmetic number, because the mean of its divisors is an integer number (4385160).

Almost surely, 2^81459882 is an apocalyptic number.

81459882 is an abundant number, since it is smaller than the sum of its proper divisors (129027798).

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

81459882 is a wasteful number, since it uses less digits than its factorization.

81459882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28147 (or 28144 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 81459882 is about 9025.5128386148. The cubic root of 81459882 is about 433.4921714881.

The spelling of 81459882 in words is "eighty-one million, four hundred fifty-nine thousand, eight hundred eighty-two".