81796800 has 84 divisors (see below), whose sum is σ = 268377416. Its totient is φ = 21811200.

The previous prime is 81796789. The next prime is 81796801. The reversal of 81796800 is 869718.

It is not an unprimeable number, because it can be changed into a prime (81796801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3721 + ... + 13320.

Almost surely, 2^81796800 is an apocalyptic number.

81796800 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

81796800 is an abundant number, since it is smaller than the sum of its proper divisors (186580616).

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

81796800 is a wasteful number, since it uses less digits than its factorization.

81796800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17066 (or 17051 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 81796800 is about 9044.1583356330. The cubic root of 81796800 is about 434.0889905080.

The spelling of 81796800 in words is "eighty-one million, seven hundred ninety-six thousand, eight hundred".