1389908 has 12 divisors (see below), whose sum is σ = 2619540. Its totient is φ = 641472.

The previous prime is 1389893. The next prime is 1389911. The reversal of 1389908 is 8099831.

It can be written as a sum of positive squares in 2 ways, for example, as 521284 + 868624 = 722^2 + 932^2 .

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, 13313 + ... + 13416.

It is an arithmetic number, because the mean of its divisors is an integer number (218295).

2^1389908 is an apocalyptic number.

It is an amenable number.

1389908 is a deficient number, since it is larger than the sum of its proper divisors (1229632).

1389908 is a wasteful number, since it uses less digits than its factorization.

1389908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26746 (or 26744 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1389908 is about 1178.9435949188. The cubic root of 1389908 is about 111.5994407375.

The spelling of 1389908 in words is "one million, three hundred eighty-nine thousand, nine hundred eight".