81832368 has 20 divisors (see below), whose sum is σ = 211400408. Its totient is φ = 27277440.

The previous prime is 81832349. The next prime is 81832379. The reversal of 81832368 is 86323818.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 852373 + ... + 852468.

Almost surely, 2^81832368 is an apocalyptic number.

It is an amenable number.

81832368 is an abundant number, since it is smaller than the sum of its proper divisors (129568040).

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

81832368 is a wasteful number, since it uses less digits than its factorization.

81832368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1704852 (or 1704846 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 81832368 is about 9046.1244740496. The cubic root of 81832368 is about 434.1519002219.

The spelling of 81832368 in words is "eighty-one million, eight hundred thirty-two thousand, three hundred sixty-eight".