81108832 has 24 divisors (see below), whose sum is σ = 182495376. Its totient is φ = 34760832.

The previous prime is 81108827. The next prime is 81108851. The reversal of 81108832 is 23880118.

It is a junction number, because it is equal to n+sod(n) for n = 81108794 and 81108803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180823 + ... + 181270.

It is an arithmetic number, because the mean of its divisors is an integer number (7603974).

Almost surely, 2^81108832 is an apocalyptic number.

It is an amenable number.

81108832 is an abundant number, since it is smaller than the sum of its proper divisors (101386544).

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

81108832 is a wasteful number, since it uses less digits than its factorization.

81108832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362110 (or 362102 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 31.

The square root of 81108832 is about 9006.0441926520. The cubic root of 81108832 is about 432.8685657329.

The spelling of 81108832 in words is "eighty-one million, one hundred eight thousand, eight hundred thirty-two".