90188404140 has 24 divisors (see below), whose sum is σ = 252527531760. Its totient is φ = 24050241088.

The previous prime is 90188404127. The next prime is 90188404177. The reversal of 90188404140 is 4140488109.

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 pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 751569975 + ... + 751570094.

It is an arithmetic number, because the mean of its divisors is an integer number (10521980490).

Almost surely, 2^90188404140 is an apocalyptic number.

It is an amenable number.

90188404140 is an abundant number, since it is smaller than the sum of its proper divisors (162339127620).

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

90188404140 is a wasteful number, since it uses less digits than its factorization.

90188404140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503140081 (or 1503140079 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 39.

The spelling of 90188404140 in words is "ninety billion, one hundred eighty-eight million, four hundred four thousand, one hundred forty".