90217404 has 36 divisors (see below), whose sum is σ = 228632040. Its totient is φ = 29995680.

The previous prime is 90217373. The next prime is 90217411. The reversal of 90217404 is 40471209.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12094 + ... + 18074.

It is an arithmetic number, because the mean of its divisors is an integer number (6350890).

Almost surely, 2^90217404 is an apocalyptic number.

It is an amenable number.

90217404 is an abundant number, since it is smaller than the sum of its proper divisors (138414636).

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

90217404 is a wasteful number, since it uses less digits than its factorization.

90217404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410 (or 6405 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 90217404 is about 9498.2842661188. The cubic root of 90217404 is about 448.5010272047.

The spelling of 90217404 in words is "ninety million, two hundred seventeen thousand, four hundred four".