90415808 has 28 divisors (see below), whose sum is σ = 205051152. Its totient is φ = 38749440.

The previous prime is 90415781. The next prime is 90415811. The reversal of 90415808 is 80851409.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100463 + ... + 101358.

Almost surely, 2^90415808 is an apocalyptic number.

It is an amenable number.

90415808 is an abundant number, since it is smaller than the sum of its proper divisors (114635344).

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

90415808 is a wasteful number, since it uses less digits than its factorization.

90415808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201840 (or 201830 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 90415808 is about 9508.7227323127. The cubic root of 90415808 is about 448.8295641337.

The spelling of 90415808 in words is "ninety million, four hundred fifteen thousand, eight hundred eight".