81600936 has 32 divisors (see below), whose sum is σ = 204243360. Its totient is φ = 27168192.

The previous prime is 81600931. The next prime is 81600943. The reversal of 81600936 is 63900618.

It is a junction number, because it is equal to n+sod(n) for n = 81600897 and 81600906.

It is not an unprimeable number, because it can be changed into a prime (81600931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27711 + ... + 30513.

It is an arithmetic number, because the mean of its divisors is an integer number (6382605).

Almost surely, 2^81600936 is an apocalyptic number.

It is an amenable number.

81600936 is an abundant number, since it is smaller than the sum of its proper divisors (122642424).

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

81600936 is a wasteful number, since it uses less digits than its factorization.

81600936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4025 (or 4021 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 81600936 is about 9033.3236408312. The cubic root of 81600936 is about 433.7422354636.

The spelling of 81600936 in words is "eighty-one million, six hundred thousand, nine hundred thirty-six".