81088842 has 16 divisors (see below), whose sum is σ = 164132640. Its totient is φ = 26703792.

The previous prime is 81088837. The next prime is 81088849. The reversal of 81088842 is 24888018.

It is a self number, because there is not a number n which added to its sum of digits gives 81088842.

It is not an unprimeable number, because it can be changed into a prime (81088849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80917 + ... + 81912.

It is an arithmetic number, because the mean of its divisors is an integer number (10258290).

Almost surely, 2^81088842 is an apocalyptic number.

81088842 is an abundant number, since it is smaller than the sum of its proper divisors (83043798).

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

81088842 is a wasteful number, since it uses less digits than its factorization.

81088842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162917.

The product of its (nonzero) digits is 32768, while the sum is 39.

The square root of 81088842 is about 9004.9343140303. The cubic root of 81088842 is about 432.8330013626.

The spelling of 81088842 in words is "eighty-one million, eighty-eight thousand, eight hundred forty-two".