2189718 has 24 divisors (see below), whose sum is σ = 4773600. Its totient is φ = 725424.

The previous prime is 2189713. The next prime is 2189723. The reversal of 2189718 is 8179812.

It is an interprime number because it is at equal distance from previous prime (2189713) and next prime (2189723).

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2189713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4048 + ... + 4556.

It is an arithmetic number, because the mean of its divisors is an integer number (198900).

2^2189718 is an apocalyptic number.

2189718 is an abundant number, since it is smaller than the sum of its proper divisors (2583882).

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

2189718 is a wasteful number, since it uses less digits than its factorization.

2189718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 756 (or 753 counting only the distinct ones).

The product of its digits is 8064, while the sum is 36.

The square root of 2189718 is about 1479.7695766571. The cubic root of 2189718 is about 129.8562118286.

The spelling of 2189718 in words is "two million, one hundred eighty-nine thousand, seven hundred eighteen".