2188749 has 8 divisors (see below), whose sum is σ = 3045312. Its totient is φ = 1395680.

The previous prime is 2188729. The next prime is 2188751. The reversal of 2188749 is 9478812.

2188749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2188749 - 2⁸ = 2188493 is a prime.

2188749 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2188729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15792 + ... + 15929.

It is an arithmetic number, because the mean of its divisors is an integer number (380664).

2^2188749 is an apocalyptic number.

It is an amenable number.

2188749 is a deficient number, since it is larger than the sum of its proper divisors (856563).

2188749 is a wasteful number, since it uses less digits than its factorization.

2188749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31747.

The product of its digits is 32256, while the sum is 39.

The square root of 2188749 is about 1479.4421245862. The cubic root of 2188749 is about 129.8370542270.

The spelling of 2188749 in words is "two million, one hundred eighty-eight thousand, seven hundred forty-nine".