81088884 has 96 divisors (see below), whose sum is σ = 226688000. Its totient is φ = 24984288.

The previous prime is 81088883. The next prime is 81088907. The reversal of 81088884 is 48888018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81088883) 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 31 ways as a sum of consecutive naturals, for example, 87777 + ... + 88695.

Almost surely, 2^81088884 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 81088884, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113344000).

81088884 is an abundant number, since it is smaller than the sum of its proper divisors (145599116).

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

81088884 is a wasteful number, since it uses less digits than its factorization.

81088884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994 (or 986 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 45.

The square root of 81088884 is about 9004.9366460847. The cubic root of 81088884 is about 432.8330760913.

The spelling of 81088884 in words is "eighty-one million, eighty-eight thousand, eight hundred eighty-four".