2188624 has 20 divisors (see below), whose sum is σ = 4356244. Its totient is φ = 1064448.

The previous prime is 2188609. The next prime is 2188639. The reversal of 2188624 is 4268812.

It is an interprime number because it is at equal distance from previous prime (2188609) and next prime (2188639).

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 1123600 = 1032^2 + 1060^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1257 + ... + 2440.

2^2188624 is an apocalyptic number.

It is an amenable number.

2188624 is a deficient number, since it is larger than the sum of its proper divisors (2167620).

2188624 is a wasteful number, since it uses less digits than its factorization.

2188624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3742 (or 3736 counting only the distinct ones).

The product of its digits is 6144, while the sum is 31.

The square root of 2188624 is about 1479.3998783290. The cubic root of 2188624 is about 129.8345825045.

The spelling of 2188624 in words is "two million, one hundred eighty-eight thousand, six hundred twenty-four".