1389585544 has 8 divisors (see below), whose sum is σ = 2605472910. Its totient is φ = 694792768.

The previous prime is 1389585529. The next prime is 1389585557. The reversal of 1389585544 is 4455859831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 849023044 + 540562500 = 29138^2 + 23250^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 1389585491 and 1389585500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86849089 + ... + 86849104.

Almost surely, 2^1389585544 is an apocalyptic number.

It is an amenable number.

1389585544 is a deficient number, since it is larger than the sum of its proper divisors (1215887366).

1389585544 is a wasteful number, since it uses less digits than its factorization.

1389585544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173698199 (or 173698195 counting only the distinct ones).

The product of its digits is 3456000, while the sum is 52.

The square root of 1389585544 is about 37277.1450623569. The cubic root of 1389585544 is about 1115.9080978436.

The spelling of 1389585544 in words is "one billion, three hundred eighty-nine million, five hundred eighty-five thousand, five hundred forty-four".