90491592 has 48 divisors (see below), whose sum is σ = 231984720. Its totient is φ = 29415040.

The previous prime is 90491587. The next prime is 90491593. The reversal of 90491592 is 29519409.

It is a self number, because there is not a number n which added to its sum of digits gives 90491592.

It is not an unprimeable number, because it can be changed into a prime (90491593) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39223 + ... + 41465.

It is an arithmetic number, because the mean of its divisors is an integer number (4833015).

Almost surely, 2^90491592 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 90491592, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (115992360).

90491592 is an abundant number, since it is smaller than the sum of its proper divisors (141493128).

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

90491592 is a wasteful number, since it uses less digits than its factorization.

90491592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2334 (or 2289 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 90491592 is about 9512.7068702867. The cubic root of 90491592 is about 448.9549279082.

The spelling of 90491592 in words is "ninety million, four hundred ninety-one thousand, five hundred ninety-two".