2188872 has 96 divisors (see below), whose sum is σ = 7001280. Its totient is φ = 604800.

The previous prime is 2188871. The next prime is 2188873. The reversal of 2188872 is 2788812.

It is an interprime number because it is at equal distance from previous prime (2188871) and next prime (2188873).

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

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (2188871) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21622 + ... + 21722.

It is an arithmetic number, because the mean of its divisors is an integer number (72930).

2^2188872 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 2188872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3500640).

2188872 is an abundant number, since it is smaller than the sum of its proper divisors (4812408).

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

2188872 is a wasteful number, since it uses less digits than its factorization.

2188872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 156 counting only the distinct ones).

The product of its digits is 14336, while the sum is 36.

The square root of 2188872 is about 1479.4836937256. The cubic root of 2188872 is about 129.8394863101.

The spelling of 2188872 in words is "two million, one hundred eighty-eight thousand, eight hundred seventy-two".