81290482 has 32 divisors (see below), whose sum is σ = 150659712. Its totient is φ = 32033664.

The previous prime is 81290477. The next prime is 81290483. The reversal of 81290482 is 28409218.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (81290483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56253 + ... + 57679.

It is an arithmetic number, because the mean of its divisors is an integer number (4708116).

Almost surely, 2^81290482 is an apocalyptic number.

81290482 is a deficient number, since it is larger than the sum of its proper divisors (69369230).

81290482 is a wasteful number, since it uses less digits than its factorization.

81290482 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1762.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 81290482 is about 9016.1234463599. The cubic root of 81290482 is about 433.1914732225.

The spelling of 81290482 in words is "eighty-one million, two hundred ninety thousand, four hundred eighty-two".