81088746 has 32 divisors (see below), whose sum is σ = 168334848. Its totient is φ = 26013120.

The previous prime is 81088717. The next prime is 81088747. The reversal of 81088746 is 64788018.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 81088698 and 81088707.

It is not an unprimeable number, because it can be changed into a prime (81088747) 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, 35536 + ... + 37748.

It is an arithmetic number, because the mean of its divisors is an integer number (5260464).

Almost surely, 2^81088746 is an apocalyptic number.

81088746 is an abundant number, since it is smaller than the sum of its proper divisors (87246102).

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

81088746 is a wasteful number, since it uses less digits than its factorization.

81088746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2446.

The product of its (nonzero) digits is 86016, while the sum is 42.

The square root of 81088746 is about 9004.9289836178. The cubic root of 81088746 is about 432.8328305542.

The spelling of 81088746 in words is "eighty-one million, eighty-eight thousand, seven hundred forty-six".