1389688 has 16 divisors (see below), whose sum is σ = 2619360. Its totient is φ = 691200.

The previous prime is 1389677. The next prime is 1389697. The reversal of 1389688 is 8869831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1848 + ... + 2488.

It is an arithmetic number, because the mean of its divisors is an integer number (163710).

2^1389688 is an apocalyptic number.

It is an amenable number.

1389688 is a deficient number, since it is larger than the sum of its proper divisors (1229672).

1389688 is a wasteful number, since it uses less digits than its factorization.

1389688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918 (or 914 counting only the distinct ones).

The product of its digits is 82944, while the sum is 43.

The square root of 1389688 is about 1178.8502873563. The cubic root of 1389688 is about 111.5935522968.

The spelling of 1389688 in words is "one million, three hundred eighty-nine thousand, six hundred eighty-eight".