81832688 has 40 divisors (see below), whose sum is σ = 183404928. Its totient is φ = 34644672.

The previous prime is 81832657. The next prime is 81832691. The reversal of 81832688 is 88623818.

It is a congruent number.

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, 4895 + ... + 13697.

Almost surely, 2^81832688 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 81832688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91702464).

81832688 is an abundant number, since it is smaller than the sum of its proper divisors (101572240).

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

81832688 is a wasteful number, since it uses less digits than its factorization.

81832688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8901 (or 8895 counting only the distinct ones).

The product of its digits is 147456, while the sum is 44.

The square root of 81832688 is about 9046.1421611646. The cubic root of 81832688 is about 434.1524661284.

The spelling of 81832688 in words is "eighty-one million, eight hundred thirty-two thousand, six hundred eighty-eight".