90685668 has 48 divisors (see below), whose sum is σ = 224844480. Its totient is φ = 28393344.

The previous prime is 90685663. The next prime is 90685691. The reversal of 90685668 is 86658609.

It is not an unprimeable number, because it can be changed into a prime (90685663) 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 15 ways as a sum of consecutive naturals, for example, 9355 + ... + 16397.

It is an arithmetic number, because the mean of its divisors is an integer number (4684260).

Almost surely, 2^90685668 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 90685668, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (112422240).

90685668 is an abundant number, since it is smaller than the sum of its proper divisors (134158812).

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

90685668 is a wasteful number, since it uses less digits than its factorization.

90685668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7116 (or 7114 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 48.

The square root of 90685668 is about 9522.9022886933. The cubic root of 90685668 is about 449.2756544309.

The spelling of 90685668 in words is "ninety million, six hundred eighty-five thousand, six hundred sixty-eight".