1389906 has 32 divisors (see below), whose sum is σ = 3530880. Its totient is φ = 397008.

The previous prime is 1389893. The next prime is 1389911. The reversal of 1389906 is 6099831.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1461 + ... + 2216.

It is an arithmetic number, because the mean of its divisors is an integer number (110340).

2^1389906 is an apocalyptic number.

1389906 is an abundant number, since it is smaller than the sum of its proper divisors (2140974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1389906 is a wasteful number, since it uses less digits than its factorization.

1389906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3695 (or 3689 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 1389906 is about 1178.9427467015. The cubic root of 1389906 is about 111.5993872090.

The spelling of 1389906 in words is "one million, three hundred eighty-nine thousand, nine hundred six".