90243258 has 16 divisors (see below), whose sum is σ = 206270400. Its totient is φ = 25783776.

The previous prime is 90243253. The next prime is 90243281. The reversal of 90243258 is 85234209.

It is a happy number.

It is a super-2 number, since 2×90243258² = 16287691228909128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (90243253) 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, 1074283 + ... + 1074366.

It is an arithmetic number, because the mean of its divisors is an integer number (12891900).

Almost surely, 2^90243258 is an apocalyptic number.

90243258 is an abundant number, since it is smaller than the sum of its proper divisors (116027142).

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

90243258 is a wasteful number, since it uses less digits than its factorization.

90243258 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148661.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 90243258 is about 9499.6451512675. The cubic root of 90243258 is about 448.5438660863.

The spelling of 90243258 in words is "ninety million, two hundred forty-three thousand, two hundred fifty-eight".