1389766 has 16 divisors (see below), whose sum is σ = 2428704. Its totient is φ = 584064.

The previous prime is 1389749. The next prime is 1389769. The reversal of 1389766 is 6679831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389769) 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, 195 + ... + 1678.

It is an arithmetic number, because the mean of its divisors is an integer number (151794).

2^1389766 is an apocalyptic number.

1389766 is a deficient number, since it is larger than the sum of its proper divisors (1038938).

1389766 is a wasteful number, since it uses less digits than its factorization.

1389766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1935.

The product of its digits is 54432, while the sum is 40.

The square root of 1389766 is about 1178.8833699735. The cubic root of 1389766 is about 111.5956400878.

The spelling of 1389766 in words is "one million, three hundred eighty-nine thousand, seven hundred sixty-six".