90231258 has 64 divisors (see below), whose sum is σ = 201019392. Its totient is φ = 26827200.

The previous prime is 90231233. The next prime is 90231259. The reversal of 90231258 is 85213209.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90231259) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 553485 + ... + 553647.

It is an arithmetic number, because the mean of its divisors is an integer number (3140928).

Almost surely, 2^90231258 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 90231258, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100509696).

90231258 is an abundant number, since it is smaller than the sum of its proper divisors (110788134).

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

90231258 is a wasteful number, since it uses less digits than its factorization.

90231258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 90231258 is about 9499.0135277301. The cubic root of 90231258 is about 448.5239836592.

The spelling of 90231258 in words is "ninety million, two hundred thirty-one thousand, two hundred fifty-eight".