81113088 has 208 divisors, whose sum is σ = 264208896. Its totient is φ = 21626880.

The previous prime is 81113059. The next prime is 81113101. The reversal of 81113088 is 88031118.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1978348 + ... + 1978388.

Almost surely, 2^81113088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81113088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132104448).

81113088 is an abundant number, since it is smaller than the sum of its proper divisors (183095808).

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

81113088 is a wasteful number, since it uses less digits than its factorization.

81113088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 30.

The square root of 81113088 is about 9006.2804753128. The cubic root of 81113088 is about 432.8761368623.

The spelling of 81113088 in words is "eighty-one million, one hundred thirteen thousand, eighty-eight".