81880232 has 32 divisors (see below), whose sum is σ = 176214720. Its totient is φ = 34940160.

The previous prime is 81880229. The next prime is 81880241. The reversal of 81880232 is 23208818.

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 7 ways as a sum of consecutive naturals, for example, 10463 + ... + 16529.

It is an arithmetic number, because the mean of its divisors is an integer number (5506710).

Almost surely, 2^81880232 is an apocalyptic number.

It is an amenable number.

81880232 is an abundant number, since it is smaller than the sum of its proper divisors (94334488).

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

81880232 is a wasteful number, since it uses less digits than its factorization.

81880232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6321 (or 6317 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 32.

The square root of 81880232 is about 9048.7696401224. The cubic root of 81880232 is about 434.2365293114.

The spelling of 81880232 in words is "eighty-one million, eight hundred eighty thousand, two hundred thirty-two".