1908189 has 12 divisors (see below), whose sum is σ = 2901600. Its totient is φ = 1205064.

The previous prime is 1908173. The next prime is 1908197. The reversal of 1908189 is 9818091.

It is not a de Polignac number, because 1908189 - 2⁴ = 1908173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908169) 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, 5409 + ... + 5750.

It is an arithmetic number, because the mean of its divisors is an integer number (241800).

2^1908189 is an apocalyptic number.

1908189 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1908189 is a deficient number, since it is larger than the sum of its proper divisors (993411).

1908189 is a wasteful number, since it uses less digits than its factorization.

1908189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11184 (or 11181 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 36.

The square root of 1908189 is about 1381.3721439207. The cubic root of 1908189 is about 124.0339180541.

The spelling of 1908189 in words is "one million, nine hundred eight thousand, one hundred eighty-nine".