2187888 has 40 divisors (see below), whose sum is σ = 5952000. Its totient is φ = 690624.

The previous prime is 2187877. The next prime is 2187901. The reversal of 2187888 is 8887812.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 288 + ... + 2111.

It is an arithmetic number, because the mean of its divisors is an integer number (148800).

2^2187888 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 2187888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2976000).

2187888 is an abundant number, since it is smaller than the sum of its proper divisors (3764112).

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

2187888 is a wasteful number, since it uses less digits than its factorization.

2187888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2429 (or 2423 counting only the distinct ones).

The product of its digits is 57344, while the sum is 42.

The square root of 2187888 is about 1479.1511078994. The cubic root of 2187888 is about 129.8200270934.

The spelling of 2187888 in words is "two million, one hundred eighty-seven thousand, eight hundred eighty-eight".