2188845 has 24 divisors (see below), whose sum is σ = 3833856. Its totient is φ = 1155168.

The previous prime is 2188831. The next prime is 2188861. The reversal of 2188845 is 5488812.

It is not a de Polignac number, because 2188845 - 2¹¹ = 2186797 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 5524 + ... + 5906.

It is an arithmetic number, because the mean of its divisors is an integer number (159744).

2^2188845 is an apocalyptic number.

It is an amenable number.

2188845 is a deficient number, since it is larger than the sum of its proper divisors (1645011).

2188845 is a wasteful number, since it uses less digits than its factorization.

2188845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521 (or 518 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 2188845 is about 1479.4745688926. The cubic root of 2188845 is about 129.8389524460.

The spelling of 2188845 in words is "two million, one hundred eighty-eight thousand, eight hundred forty-five".