90680044 has 48 divisors (see below), whose sum is σ = 200619328. Its totient is φ = 34898688.

The previous prime is 90680041. The next prime is 90680087. The reversal of 90680044 is 44008609.

It is a junction number, because it is equal to n+sod(n) for n = 90679988 and 90680015.

It is not an unprimeable number, because it can be changed into a prime (90680041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10102 + ... + 16834.

Almost surely, 2^90680044 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 90680044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100309664).

90680044 is an abundant number, since it is smaller than the sum of its proper divisors (109939284).

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

90680044 is a wasteful number, since it uses less digits than its factorization.

90680044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6794 (or 6792 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 90680044 is about 9522.6069959859. The cubic root of 90680044 is about 449.2663667505.

The spelling of 90680044 in words is "ninety million, six hundred eighty thousand, forty-four".