2209888 has 24 divisors (see below), whose sum is σ = 4436208. Its totient is φ = 1083264.

The previous prime is 2209853. The next prime is 2209891. The reversal of 2209888 is 8889022.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1045 + ... + 2347.

It is an arithmetic number, because the mean of its divisors is an integer number (184842).

2^2209888 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2209888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2218104).

2209888 is an abundant number, since it is smaller than the sum of its proper divisors (2226320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2209888 is a wasteful number, since it uses less digits than its factorization.

2209888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1366 (or 1358 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 37.

The square root of 2209888 is about 1486.5692045781. The cubic root of 2209888 is about 130.2537057337.

The spelling of 2209888 in words is "two million, two hundred nine thousand, eight hundred eighty-eight".