2189916 has 42 divisors (see below), whose sum is σ = 5753552. Its totient is φ = 729000.

The previous prime is 2189881. The next prime is 2189939. The reversal of 2189916 is 6199812.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a d-powerful number, because it can be written as 2²¹ + 1 + 8⁵ + 9³ + 9⁵ + 1 + 6³ .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2541 + ... + 3291.

2^2189916 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 2189916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2876776).

2189916 is an abundant number, since it is smaller than the sum of its proper divisors (3563636).

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

2189916 is an equidigital number, since it uses as much as digits as its factorization.

2189916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773 (or 756 counting only the distinct ones).

The product of its digits is 7776, while the sum is 36.

The square root of 2189916 is about 1479.8364774528. The cubic root of 2189916 is about 129.8601256895.

The spelling of 2189916 in words is "two million, one hundred eighty-nine thousand, nine hundred sixteen".