81793282 has 16 divisors (see below), whose sum is σ = 128534400. Its totient is φ = 38984400.

The previous prime is 81793279. The next prime is 81793289. The reversal of 81793282 is 28239718.

It is not an unprimeable number, because it can be changed into a prime (81793289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4344 + ... + 13507.

It is an arithmetic number, because the mean of its divisors is an integer number (8033400).

Almost surely, 2^81793282 is an apocalyptic number.

81793282 is a deficient number, since it is larger than the sum of its proper divisors (46741118).

81793282 is a wasteful number, since it uses less digits than its factorization.

81793282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17961.

The product of its digits is 48384, while the sum is 40.

The square root of 81793282 is about 9043.9638433598. The cubic root of 81793282 is about 434.0827671717.

The spelling of 81793282 in words is "eighty-one million, seven hundred ninety-three thousand, two hundred eighty-two".