90028774 has 32 divisors (see below), whose sum is σ = 153695232. Its totient is φ = 39180000.

The previous prime is 90028769. The next prime is 90028801. The reversal of 90028774 is 47782009.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68229 + ... + 69535.

It is an arithmetic number, because the mean of its divisors is an integer number (4802976).

Almost surely, 2^90028774 is an apocalyptic number.

90028774 is a deficient number, since it is larger than the sum of its proper divisors (63666458).

90028774 is a wasteful number, since it uses less digits than its factorization.

90028774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1452.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 90028774 is about 9488.3493822688. The cubic root of 90028774 is about 448.1882280633.

The spelling of 90028774 in words is "ninety million, twenty-eight thousand, seven hundred seventy-four".