90900400 has 30 divisors (see below), whose sum is σ = 218389172. Its totient is φ = 36360000.

The previous prime is 90900371. The next prime is 90900421. The reversal of 90900400 is 400909.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 113226 + ... + 114025.

Almost surely, 2^90900400 is an apocalyptic number.

It is an amenable number.

90900400 is an abundant number, since it is smaller than the sum of its proper divisors (127488772).

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

90900400 is a wasteful number, since it uses less digits than its factorization.

90900400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227269 (or 227258 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 90900400 is about 9534.1701264452. The cubic root of 90900400 is about 449.6299839005.

The spelling of 90900400 in words is "ninety million, nine hundred thousand, four hundred".