81127296 has 48 divisors (see below), whose sum is σ = 233455560. Its totient is φ = 27042048.

The previous prime is 81127289. The next prime is 81127307. The reversal of 81127296 is 69272118.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 81127296.

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 5 ways as a sum of consecutive naturals, for example, 34060 + ... + 36363.

Almost surely, 2^81127296 is an apocalyptic number.

It is an amenable number.

81127296 is an abundant number, since it is smaller than the sum of its proper divisors (152328264).

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

81127296 is a wasteful number, since it uses less digits than its factorization.

81127296 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70443 (or 70428 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 81127296 is about 9007.0692236709. The cubic root of 81127296 is about 432.9014099933.

The spelling of 81127296 in words is "eighty-one million, one hundred twenty-seven thousand, two hundred ninety-six".