90901554 has 16 divisors (see below), whose sum is σ = 182142048. Its totient is φ = 30244032.

The previous prime is 90901511. The next prime is 90901561. The reversal of 90901554 is 45510909.

It is a super-2 number, since 2×90901554² = 16526185039229832, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10567 + ... + 17130.

It is an arithmetic number, because the mean of its divisors is an integer number (11383878).

Almost surely, 2^90901554 is an apocalyptic number.

90901554 is an abundant number, since it is smaller than the sum of its proper divisors (91240494).

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

90901554 is a wasteful number, since it uses less digits than its factorization.

90901554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28249.

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 90901554 is about 9534.2306454165. The cubic root of 90901554 is about 449.6318866087.

The spelling of 90901554 in words is "ninety million, nine hundred one thousand, five hundred fifty-four".