90990492 has 12 divisors (see below), whose sum is σ = 212311176. Its totient is φ = 30330160.

The previous prime is 90990479. The next prime is 90990503. The reversal of 90990492 is 29409909.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3791259 + ... + 3791282.

It is an arithmetic number, because the mean of its divisors is an integer number (17692598).

Almost surely, 2^90990492 is an apocalyptic number.

It is an amenable number.

90990492 is an abundant number, since it is smaller than the sum of its proper divisors (121320684).

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

90990492 is a wasteful number, since it uses less digits than its factorization.

90990492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7582548 (or 7582546 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 90990492 is about 9538.8936465399. The cubic root of 90990492 is about 449.7784786239.

The spelling of 90990492 in words is "ninety million, nine hundred ninety thousand, four hundred ninety-two".