81292088 has 32 divisors (see below), whose sum is σ = 156135600. Its totient is φ = 39666432.

The previous prime is 81292067. The next prime is 81292117. The reversal of 81292088 is 88029218.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 73556 + ... + 74652.

Almost surely, 2^81292088 is an apocalyptic number.

It is an amenable number.

81292088 is a deficient number, since it is larger than the sum of its proper divisors (74843512).

81292088 is a wasteful number, since it uses less digits than its factorization.

81292088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1319 (or 1315 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 81292088 is about 9016.2125085870. The cubic root of 81292088 is about 433.1943259588.

The spelling of 81292088 in words is "eighty-one million, two hundred ninety-two thousand, eighty-eight".