90818880 has 56 divisors (see below), whose sum is σ = 288352992. Its totient is φ = 24218112.

The previous prime is 90818863. The next prime is 90818887. The reversal of 90818880 is 8881809.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90818887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46342 + ... + 48261.

Almost surely, 2^90818880 is an apocalyptic number.

It is an amenable number.

90818880 is an abundant number, since it is smaller than the sum of its proper divisors (197534112).

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

90818880 is a wasteful number, since it uses less digits than its factorization.

90818880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94623 (or 94613 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 42.

The square root of 90818880 is about 9529.8940182984. The cubic root of 90818880 is about 449.4955334512.

The spelling of 90818880 in words is "ninety million, eight hundred eighteen thousand, eight hundred eighty".