81233976 has 32 divisors (see below), whose sum is σ = 211916160. Its totient is φ = 25900512.

The previous prime is 81233969. The next prime is 81234029. The reversal of 81233976 is 67933218.

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, 73030 + ... + 74133.

It is an arithmetic number, because the mean of its divisors is an integer number (6622380).

Almost surely, 2^81233976 is an apocalyptic number.

It is an amenable number.

81233976 is an abundant number, since it is smaller than the sum of its proper divisors (130682184).

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

81233976 is a wasteful number, since it uses less digits than its factorization.

81233976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147195 (or 147191 counting only the distinct ones).

The product of its digits is 54432, while the sum is 39.

The square root of 81233976 is about 9012.9892932367. The cubic root of 81233976 is about 433.0910777412.

The spelling of 81233976 in words is "eighty-one million, two hundred thirty-three thousand, nine hundred seventy-six".