2172888 has 48 divisors (see below), whose sum is σ = 5962320. Its totient is φ = 714816.

The previous prime is 2172887. The next prime is 2172893. The reversal of 2172888 is 8882712.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7270 + ... + 7562.

It is an arithmetic number, because the mean of its divisors is an integer number (124215).

2^2172888 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 2172888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2981160).

2172888 is an abundant number, since it is smaller than the sum of its proper divisors (3789432).

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

2172888 is a wasteful number, since it uses less digits than its factorization.

2172888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408 (or 401 counting only the distinct ones).

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

The square root of 2172888 is about 1474.0719114073. The cubic root of 2172888 is about 129.5226676281.

The spelling of 2172888 in words is "two million, one hundred seventy-two thousand, eight hundred eighty-eight".