90220992 has 112 divisors (see below), whose sum is σ = 249460512. Its totient is φ = 28753920.

The previous prime is 90220981. The next prime is 90221003. The reversal of 90220992 is 29902209.

It is an interprime number because it is at equal distance from previous prime (90220981) and next prime (90221003).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 574578 + ... + 574734.

It is an arithmetic number, because the mean of its divisors is an integer number (2227326).

Almost surely, 2^90220992 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 90220992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124730256).

90220992 is an abundant number, since it is smaller than the sum of its proper divisors (159239520).

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

90220992 is a wasteful number, since it uses less digits than its factorization.

90220992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 90220992 is about 9498.4731404579. The cubic root of 90220992 is about 448.5069728437.

The spelling of 90220992 in words is "ninety million, two hundred twenty thousand, nine hundred ninety-two".