2188630 has 16 divisors (see below), whose sum is σ = 4075920. Its totient is φ = 845152.

The previous prime is 2188609. The next prime is 2188639. The reversal of 2188630 is 368812.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484 + ... + 4063.

It is an arithmetic number, because the mean of its divisors is an integer number (254745).

2^2188630 is an apocalyptic number.

2188630 is a deficient number, since it is larger than the sum of its proper divisors (1887290).

2188630 is a wasteful number, since it uses less digits than its factorization.

2188630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7583.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2188630 is about 1479.4019061770. The cubic root of 2188630 is about 129.8347011493.

The spelling of 2188630 in words is "two million, one hundred eighty-eight thousand, six hundred thirty".