1380686 has 8 divisors (see below), whose sum is σ = 2086560. Its totient is φ = 685168.

The previous prime is 1380679. The next prime is 1380707. The reversal of 1380686 is 6860831.

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

It is an Ulam 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, 2246 + ... + 2793.

It is an arithmetic number, because the mean of its divisors is an integer number (260820).

2^1380686 is an apocalyptic number.

1380686 is a deficient number, since it is larger than the sum of its proper divisors (705874).

1380686 is a wasteful number, since it uses less digits than its factorization.

1380686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5178.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 1380686 is about 1175.0259571601. The cubic root of 1380686 is about 111.3520731321.

The spelling of 1380686 in words is "one million, three hundred eighty thousand, six hundred eighty-six".