81682888 has 16 divisors (see below), whose sum is σ = 175034880. Its totient is φ = 35006928.

The previous prime is 81682877. The next prime is 81682889. The reversal of 81682888 is 88828618.

It is not an unprimeable number, because it can be changed into a prime (81682889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 729256 + ... + 729367.

It is an arithmetic number, because the mean of its divisors is an integer number (10939680).

Almost surely, 2^81682888 is an apocalyptic number.

It is an amenable number.

81682888 is an abundant number, since it is smaller than the sum of its proper divisors (93351992).

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

81682888 is a wasteful number, since it uses less digits than its factorization.

81682888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458636 (or 1458632 counting only the distinct ones).

The product of its digits is 393216, while the sum is 49.

The square root of 81682888 is about 9037.8585959286. The cubic root of 81682888 is about 433.8873896427.

The spelling of 81682888 in words is "eighty-one million, six hundred eighty-two thousand, eight hundred eighty-eight".