90108190 has 32 divisors (see below), whose sum is σ = 165473280. Its totient is φ = 35322144.

The previous prime is 90108173. The next prime is 90108199. The reversal of 90108190 is 9180109.

It is a super-2 number, since 2×90108190² = 16238971810152200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90108199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 131589 + ... + 132271.

It is an arithmetic number, because the mean of its divisors is an integer number (5171040).

Almost surely, 2^90108190 is an apocalyptic number.

90108190 is a deficient number, since it is larger than the sum of its proper divisors (75365090).

90108190 is a wasteful number, since it uses less digits than its factorization.

90108190 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 936.

The product of its (nonzero) digits is 648, while the sum is 28.

The square root of 90108190 is about 9492.5333815584. The cubic root of 90108190 is about 448.3199742967.

Adding to 90108190 its reverse (9180109), we get a palindrome (99288299).

The spelling of 90108190 in words is "ninety million, one hundred eight thousand, one hundred ninety".