2188004 has 24 divisors (see below), whose sum is σ = 4713408. Its totient is φ = 865440.

The previous prime is 2188001. The next prime is 2188031. The reversal of 2188004 is 4008812.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (2188001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2642 + ... + 3369.

It is an arithmetic number, because the mean of its divisors is an integer number (196392).

2^2188004 is an apocalyptic number.

It is an amenable number.

2188004 is an abundant number, since it is smaller than the sum of its proper divisors (2525404).

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

2188004 is a wasteful number, since it uses less digits than its factorization.

2188004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6035 (or 6033 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 2188004 is about 1479.1903190597. The cubic root of 2188004 is about 129.8223213694.

The spelling of 2188004 in words is "two million, one hundred eighty-eight thousand, four".