81486882 has 24 divisors (see below), whose sum is σ = 186941196. Its totient is φ = 25564416.

The previous prime is 81486869. The next prime is 81486893. The reversal of 81486882 is 28868418.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 78694641 + 2792241 = 8871^2 + 1671^2 .

It is a super-2 number, since 2×81486882² = 13280223876163848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132843 + ... + 133454.

Almost surely, 2^81486882 is an apocalyptic number.

81486882 is an abundant number, since it is smaller than the sum of its proper divisors (105454314).

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

81486882 is a wasteful number, since it uses less digits than its factorization.

81486882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266322 (or 266319 counting only the distinct ones).

The product of its digits is 196608, while the sum is 45.

The square root of 81486882 is about 9027.0084745723. The cubic root of 81486882 is about 433.5400600743.

The spelling of 81486882 in words is "eighty-one million, four hundred eighty-six thousand, eight hundred eighty-two".