90426 has 16 divisors (see below), whose sum is σ = 206784. Its totient is φ = 25824.

The previous prime is 90407. The next prime is 90437. The reversal of 90426 is 62409.

It is a super-2 number, since 2×90426² = 16353722952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 90426.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1035 + ... + 1118.

It is an arithmetic number, because the mean of its divisors is an integer number (12924).

2⁹⁰⁴²⁶ is an apocalyptic number.

90426 is an abundant number, since it is smaller than the sum of its proper divisors (116358).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103392).

90426 is a wasteful number, since it uses less digits than its factorization.

90426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2165.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 90426 is about 300.7091618159. The cubic root of 90426 is about 44.8846428069.

The spelling of 90426 in words is "ninety thousand, four hundred twenty-six".