90049188 has 12 divisors (see below), whose sum is σ = 210114800. Its totient is φ = 30016392.

The previous prime is 90049171. The next prime is 90049207. The reversal of 90049188 is 88194009.

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

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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, 3752038 + ... + 3752061.

Almost surely, 2^90049188 is an apocalyptic number.

It is an amenable number.

90049188 is an abundant number, since it is smaller than the sum of its proper divisors (120065612).

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

90049188 is a wasteful number, since it uses less digits than its factorization.

90049188 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7504106 (or 7504104 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 90049188 is about 9489.4250616146. The cubic root of 90049188 is about 448.2221010228. Note that the first 3 decimals are identical.

The spelling of 90049188 in words is "ninety million, forty-nine thousand, one hundred eighty-eight".