1389806 has 12 divisors (see below), whose sum is σ = 2291856. Its totient is φ = 631620.

The previous prime is 1389797. The next prime is 1389809. The reversal of 1389806 is 6089831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389809) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2630 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (190988).

2^1389806 is an apocalyptic number.

1389806 is a deficient number, since it is larger than the sum of its proper divisors (902050).

1389806 is a wasteful number, since it uses less digits than its factorization.

1389806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5767 (or 5756 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 35.

The square root of 1389806 is about 1178.9003350581. The cubic root of 1389806 is about 111.5967107195.

The spelling of 1389806 in words is "one million, three hundred eighty-nine thousand, eight hundred six".