2188923 has 16 divisors (see below), whose sum is σ = 3217536. Its totient is φ = 1312640.

The previous prime is 2188919. The next prime is 2188981. The reversal of 2188923 is 3298812.

It is a cyclic number.

It is not a de Polignac number, because 2188923 - 2² = 2188919 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (2188913) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3436 + ... + 4022.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^2188923 is an apocalyptic number.

2188923 is a deficient number, since it is larger than the sum of its proper divisors (1028613).

2188923 is a wasteful number, since it uses less digits than its factorization.

2188923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 714.

The product of its digits is 6912, while the sum is 33.

The square root of 2188923 is about 1479.5009293677. The cubic root of 2188923 is about 129.8404947081.

It can be divided in two parts, 21889 and 23, that added together give a palindrome (21912).

The spelling of 2188923 in words is "two million, one hundred eighty-eight thousand, nine hundred twenty-three".