90972798 has 32 divisors (see below), whose sum is σ = 218883840. Its totient is φ = 24624000.

The previous prime is 90972781. The next prime is 90972823. The reversal of 90972798 is 89727909.

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 90972798.

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, 56203 + ... + 57798.

It is an arithmetic number, because the mean of its divisors is an integer number (6840120).

Almost surely, 2^90972798 is an apocalyptic number.

90972798 is an abundant number, since it is smaller than the sum of its proper divisors (127911042).

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

90972798 is a wasteful number, since it uses less digits than its factorization.

90972798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114032.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 90972798 is about 9537.9661353980. The cubic root of 90972798 is about 449.7493221112.

The spelling of 90972798 in words is "ninety million, nine hundred seventy-two thousand, seven hundred ninety-eight".