90881688 has 32 divisors (see below), whose sum is σ = 227626560. Its totient is φ = 30237600.

The previous prime is 90881683. The next prime is 90881689. The reversal of 90881688 is 88618809.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90881683) 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, 10863 + ... + 17313.

It is an arithmetic number, because the mean of its divisors is an integer number (7113330).

Almost surely, 2^90881688 is an apocalyptic number.

It is an amenable number.

90881688 is an abundant number, since it is smaller than the sum of its proper divisors (136744872).

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

90881688 is a wasteful number, since it uses less digits than its factorization.

90881688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7047 (or 7043 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 48.

The square root of 90881688 is about 9533.1887634726. The cubic root of 90881688 is about 449.5991294209.

The spelling of 90881688 in words is "ninety million, eight hundred eighty-one thousand, six hundred eighty-eight".