1389144 has 16 divisors (see below), whose sum is σ = 3472920. Its totient is φ = 463040.

The previous prime is 1389139. The next prime is 1389149. The reversal of 1389144 is 4419831.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1389139) and next prime (1389149).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28917 + ... + 28964.

2^1389144 is an apocalyptic number.

It is an amenable number.

1389144 is an abundant number, since it is smaller than the sum of its proper divisors (2083776).

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

1389144 is a wasteful number, since it uses less digits than its factorization.

1389144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57890 (or 57886 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 1389144 is about 1178.6195314859. The cubic root of 1389144 is about 111.5789891202.

The spelling of 1389144 in words is "one million, three hundred eighty-nine thousand, one hundred forty-four".