90811392 has 176 divisors, whose sum is σ = 286121472. Its totient is φ = 25067520.

The previous prime is 90811381. The next prime is 90811397. The reversal of 90811392 is 29311809.

It is not an unprimeable number, because it can be changed into a prime (90811397) 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, 881613 + ... + 881715.

Almost surely, 2^90811392 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 90811392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143060736).

90811392 is an abundant number, since it is smaller than the sum of its proper divisors (195310080).

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

90811392 is a wasteful number, since it uses less digits than its factorization.

90811392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174 (or 156 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 33.

The square root of 90811392 is about 9529.5011411931. The cubic root of 90811392 is about 449.4831795036.

The spelling of 90811392 in words is "ninety million, eight hundred eleven thousand, three hundred ninety-two".