1938689 has 8 divisors (see below), whose sum is σ = 2010048. Its totient is φ = 1868400.

The previous prime is 1938659. The next prime is 1938701. The reversal of 1938689 is 9868391.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1938689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1938659) 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, 5414 + ... + 5760.

It is an arithmetic number, because the mean of its divisors is an integer number (251256).

2^1938689 is an apocalyptic number.

It is an amenable number.

1938689 is a deficient number, since it is larger than the sum of its proper divisors (71359).

1938689 is a wasteful number, since it uses less digits than its factorization.

1938689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 535.

The product of its digits is 93312, while the sum is 44.

The square root of 1938689 is about 1392.3681266102. The cubic root of 1938689 is about 124.6912701146.

The spelling of 1938689 in words is "one million, nine hundred thirty-eight thousand, six hundred eighty-nine".