1928189 has 8 divisors (see below), whose sum is σ = 1995840. Its totient is φ = 1861600.

The previous prime is 1928183. The next prime is 1928203. The reversal of 1928189 is 9818291.

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 1928189 - 2¹² = 1924093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928183) 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, 5192 + ... + 5550.

It is an arithmetic number, because the mean of its divisors is an integer number (249480).

2^1928189 is an apocalyptic number.

It is an amenable number.

1928189 is a deficient number, since it is larger than the sum of its proper divisors (67651).

1928189 is a wasteful number, since it uses less digits than its factorization.

1928189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531.

The product of its digits is 10368, while the sum is 38.

The square root of 1928189 is about 1388.5924528097. The cubic root of 1928189 is about 124.4657518846.

The spelling of 1928189 in words is "one million, nine hundred twenty-eight thousand, one hundred eighty-nine".