1389008 has 10 divisors (see below), whose sum is σ = 2691234. Its totient is φ = 694496.

The previous prime is 1389007. The next prime is 1389083. The reversal of 1389008 is 8009831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 107584 = 1132^2 + 328^2 .

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43391 + ... + 43422.

2^1389008 is an apocalyptic number.

It is an amenable number.

1389008 is a deficient number, since it is larger than the sum of its proper divisors (1302226).

1389008 is an equidigital number, since it uses as much as digits as its factorization.

1389008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86821 (or 86815 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1389008 is about 1178.5618354588. The cubic root of 1389008 is about 111.5753477320.

The spelling of 1389008 in words is "one million, three hundred eighty-nine thousand, eight".