90108045 has 56 divisors (see below), whose sum is σ = 165261600. Its totient is φ = 47130336.

The previous prime is 90107993. The next prime is 90108047. The reversal of 90108045 is 54080109.

It is not a de Polignac number, because 90108045 - 2⁹ = 90107533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90108047) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 214846 + ... + 215264.

It is an arithmetic number, because the mean of its divisors is an integer number (2951100).

Almost surely, 2^90108045 is an apocalyptic number.

It is an amenable number.

90108045 is a deficient number, since it is larger than the sum of its proper divisors (75153555).

90108045 is an equidigital number, since it uses as much as digits as its factorization.

90108045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 90108045 is about 9492.5257439735. The cubic root of 90108045 is about 448.3197338212.

The spelling of 90108045 in words is "ninety million, one hundred eight thousand, forty-five".