90128258 has 16 divisors (see below), whose sum is σ = 150914016. Its totient is φ = 40014240.

The previous prime is 90128251. The next prime is 90128273. The reversal of 90128258 is 85282109.

It is a super-3 number, since 3×90128258³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (90128251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46691 + ... + 48582.

It is an arithmetic number, because the mean of its divisors is an integer number (9432126).

Almost surely, 2^90128258 is an apocalyptic number.

90128258 is a deficient number, since it is larger than the sum of its proper divisors (60785758).

90128258 is a wasteful number, since it uses less digits than its factorization.

90128258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95329.

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

The square root of 90128258 is about 9493.5903640298. The cubic root of 90128258 is about 448.3532536151.

The spelling of 90128258 in words is "ninety million, one hundred twenty-eight thousand, two hundred fifty-eight".