2189964 has 72 divisors (see below), whose sum is σ = 6243328. Its totient is φ = 584640.

The previous prime is 2189939. The next prime is 2189981. The reversal of 2189964 is 4699812.

Its product of digits (31104) is a multiple of the sum of its prime divisors (72).

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, 70629 + ... + 70659.

2^2189964 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 2189964, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3121664).

2189964 is an abundant number, since it is smaller than the sum of its proper divisors (4053364).

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

2189964 is a wasteful number, since it uses less digits than its factorization.

2189964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 72 counting only the distinct ones).

The product of its digits is 31104, while the sum is 39.

The square root of 2189964 is about 1479.8526953721. The cubic root of 2189964 is about 129.8610744687.

The spelling of 2189964 in words is "two million, one hundred eighty-nine thousand, nine hundred sixty-four".