90668844 has 72 divisors (see below), whose sum is σ = 262965248. Its totient is φ = 25803360.

The previous prime is 90668843. The next prime is 90668863. The reversal of 90668844 is 44886609.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 90668844.

It is not an unprimeable number, because it can be changed into a prime (90668843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 82869 + ... + 83955.

Almost surely, 2^90668844 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 90668844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131482624).

90668844 is an abundant number, since it is smaller than the sum of its proper divisors (172296404).

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

90668844 is a wasteful number, since it uses less digits than its factorization.

90668844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1435 (or 1430 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 90668844 is about 9522.0189035729. The cubic root of 90668844 is about 449.2478695146.

The spelling of 90668844 in words is "ninety million, six hundred sixty-eight thousand, eight hundred forty-four".