90909372 has 12 divisors (see below), whose sum is σ = 212121896. Its totient is φ = 30303120.

The previous prime is 90909367. The next prime is 90909373. The reversal of 90909372 is 27390909.

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

It is a self number, because there is not a number n which added to its sum of digits gives 90909372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90909373) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3787879 + ... + 3787902.

Almost surely, 2^90909372 is an apocalyptic number.

It is an amenable number.

90909372 is an abundant number, since it is smaller than the sum of its proper divisors (121212524).

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

90909372 is a wasteful number, since it uses less digits than its factorization.

90909372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7575788 (or 7575786 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 90909372 is about 9534.6406329762. The cubic root of 90909372 is about 449.6447764555.

The spelling of 90909372 in words is "ninety million, nine hundred nine thousand, three hundred seventy-two".