2189736 has 48 divisors (see below), whose sum is σ = 6282900. Its totient is φ = 686592.

The previous prime is 2189729. The next prime is 2189741. The reversal of 2189736 is 6379812.

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 367236 = 1350^2 + 606^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 2189736.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 330 + ... + 2118.

2^2189736 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 2189736, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3141450).

2189736 is an abundant number, since it is smaller than the sum of its proper divisors (4093164).

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

2189736 is a wasteful number, since it uses less digits than its factorization.

2189736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818 (or 1811 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 2189736 is about 1479.7756586726. The cubic root of 2189736 is about 129.8565676438.

The spelling of 2189736 in words is "two million, one hundred eighty-nine thousand, seven hundred thirty-six".