90900192 has 24 divisors (see below), whose sum is σ = 238613256. Its totient is φ = 30300032.

The previous prime is 90900167. The next prime is 90900193. The reversal of 90900192 is 29100909.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90900193) 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, 473343 + ... + 473534.

It is an arithmetic number, because the mean of its divisors is an integer number (9942219).

Almost surely, 2^90900192 is an apocalyptic number.

It is an amenable number.

90900192 is an abundant number, since it is smaller than the sum of its proper divisors (147713064).

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

90900192 is a wasteful number, since it uses less digits than its factorization.

90900192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946890 (or 946882 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 90900192 is about 9534.1592183055. The cubic root of 90900192 is about 449.6296409497.

The spelling of 90900192 in words is "ninety million, nine hundred thousand, one hundred ninety-two".