2188992 has 56 divisors (see below), whose sum is σ = 6244336. Its totient is φ = 672768.

The previous prime is 2188987. The next prime is 2188993. The reversal of 2188992 is 2998812.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 2188992.

It is not an unprimeable number, because it can be changed into a prime (2188993) 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, 2058 + ... + 2934.

It is an arithmetic number, because the mean of its divisors is an integer number (111506).

2^2188992 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 2188992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3122168).

2188992 is an abundant number, since it is smaller than the sum of its proper divisors (4055344).

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

2188992 is a wasteful number, since it uses less digits than its factorization.

2188992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 905 (or 895 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 2188992 is about 1479.5242478581. The cubic root of 2188992 is about 129.8418589864.

The spelling of 2188992 in words is "two million, one hundred eighty-eight thousand, nine hundred ninety-two".