90026 has 4 divisors (see below), whose sum is σ = 135042. Its totient is φ = 45012.

The previous prime is 90023. The next prime is 90031. The reversal of 90026 is 62009.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62009 = 59 ⋅1051.

It can be written as a sum of positive squares in only one way, i.e., 89401 + 625 = 299^2 + 25^2 .

It is a Curzon number.

It is a zygodrome in base 4.

It is a junction number, because it is equal to n+sod(n) for n = 89986 and 90013.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90026.

It is not an unprimeable number, because it can be changed into a prime (90023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22505 + ... + 22508.

2⁹⁰⁰²⁶ is an apocalyptic number.

90026 is a deficient number, since it is larger than the sum of its proper divisors (45016).

90026 is a wasteful number, since it uses less digits than its factorization.

90026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45015.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 90026 is about 300.0433302042. The cubic root of 90026 is about 44.8183624769.

Subtracting from 90026 its sum of digits (17), we obtain a palindrome (90009).

The spelling of 90026 in words is "ninety thousand, twenty-six".