90908 has 6 divisors (see below), whose sum is σ = 159096. Its totient is φ = 45452.

The previous prime is 90907. The next prime is 90911. The reversal of 90908 is 80909.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11360 + ... + 11367.

It is an arithmetic number, because the mean of its divisors is an integer number (26516).

2⁹⁰⁹⁰⁸ is an apocalyptic number.

It is an amenable number.

90908 is a deficient number, since it is larger than the sum of its proper divisors (68188).

90908 is a wasteful number, since it uses less digits than its factorization.

90908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22731 (or 22729 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 90908 is about 301.5095355043. The cubic root of 90908 is about 44.9642514438.

Subtracting from 90908 its reverse (80909), we obtain a palindrome (9999).

The spelling of 90908 in words is "ninety thousand, nine hundred eight".