81926600 has 96 divisors (see below), whose sum is σ = 219777600. Its totient is φ = 27820800.

The previous prime is 81926591. The next prime is 81926617. The reversal of 81926600 is 662918.

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 23 ways as a sum of consecutive naturals, for example, 194390 + ... + 194810.

It is an arithmetic number, because the mean of its divisors is an integer number (2289350).

Almost surely, 2^81926600 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81926600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109888800).

81926600 is an abundant number, since it is smaller than the sum of its proper divisors (137851000).

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

81926600 is a wasteful number, since it uses less digits than its factorization.

81926600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 583 (or 574 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 81926600 is about 9051.3313937785. The cubic root of 81926600 is about 434.3184818552.

The spelling of 81926600 in words is "eighty-one million, nine hundred twenty-six thousand, six hundred".