90183972 has 12 divisors (see below), whose sum is σ = 210429296. Its totient is φ = 30061320.

The previous prime is 90183971. The next prime is 90184001. The reversal of 90183972 is 27938109.

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 90183972.

It is not an unprimeable number, because it can be changed into a prime (90183971) 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, 3757654 + ... + 3757677.

Almost surely, 2^90183972 is an apocalyptic number.

It is an amenable number.

90183972 is an abundant number, since it is smaller than the sum of its proper divisors (120245324).

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

90183972 is a wasteful number, since it uses less digits than its factorization.

90183972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515338 (or 7515336 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 90183972 is about 9496.5242062557. The cubic root of 90183972 is about 448.4456197917.

The spelling of 90183972 in words is "ninety million, one hundred eighty-three thousand, nine hundred seventy-two".