90940 has 12 divisors (see below), whose sum is σ = 191016. Its totient is φ = 36368.

The previous prime is 90931. The next prime is 90947. The reversal of 90940 is 4909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90947) by changing a digit.

90940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2254 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (15918).

2⁹⁰⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

90940 is an abundant number, since it is smaller than the sum of its proper divisors (100076).

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 (95508).

90940 is a wasteful number, since it uses less digits than its factorization.

90940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556 (or 4554 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 90940 is about 301.5625971502. The cubic root of 90940 is about 44.9695266937.

It can be divided in two parts, 909 and 40, that added together give a palindrome (949).

The spelling of 90940 in words is "ninety thousand, nine hundred forty".