81826924 has 12 divisors (see below), whose sum is σ = 144026064. Its totient is φ = 40676624.

The previous prime is 81826909. The next prime is 81826957. The reversal of 81826924 is 42962818.

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, 58432 + ... + 59815.

It is an arithmetic number, because the mean of its divisors is an integer number (12002172).

Almost surely, 2^81826924 is an apocalyptic number.

It is an amenable number.

81826924 is a deficient number, since it is larger than the sum of its proper divisors (62199140).

81826924 is a wasteful number, since it uses less digits than its factorization.

81826924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118424 (or 118422 counting only the distinct ones).

The product of its digits is 55296, while the sum is 40.

The square root of 81826924 is about 9045.8235667075. The cubic root of 81826924 is about 434.1422725101.

The spelling of 81826924 in words is "eighty-one million, eight hundred twenty-six thousand, nine hundred twenty-four".