90490278 has 16 divisors (see below), whose sum is σ = 181794816. Its totient is φ = 30027720.

The previous prime is 90490259. The next prime is 90490291. The reversal of 90490278 is 87209409.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 32478 + ... + 35153.

It is an arithmetic number, because the mean of its divisors is an integer number (11362176).

Almost surely, 2^90490278 is an apocalyptic number.

90490278 is an abundant number, since it is smaller than the sum of its proper divisors (91304538).

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

90490278 is a wasteful number, since it uses less digits than its factorization.

90490278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67859.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 90490278 is about 9512.6378045209. The cubic root of 90490278 is about 448.9527548532.

The spelling of 90490278 in words is "ninety million, four hundred ninety thousand, two hundred seventy-eight".