2209890123 has 24 divisors (see below), whose sum is σ = 3699461376. Its totient is φ = 1245006000.

The previous prime is 2209890113. The next prime is 2209890169. The reversal of 2209890123 is 3210989022.

It is not a de Polignac number, because 2209890123 - 2⁴ = 2209890107 is a prime.

It is a super-2 number, since 2×2209890123² = 9767228711465910258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2209890113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 242553 + ... + 251498.

It is an arithmetic number, because the mean of its divisors is an integer number (154144224).

Almost surely, 2^2209890123 is an apocalyptic number.

2209890123 is a deficient number, since it is larger than the sum of its proper divisors (1489571253).

2209890123 is a wasteful number, since it uses less digits than its factorization.

2209890123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494135 (or 494132 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 2209890123 is about 47009.4684398792. The cubic root of 2209890123 is about 1302.5374744444.

The spelling of 2209890123 in words is "two billion, two hundred nine million, eight hundred ninety thousand, one hundred twenty-three".