1389556845 has 24 divisors (see below), whose sum is σ = 2513287296. Its totient is φ = 708874848.

The previous prime is 1389556843. The next prime is 1389556853. The reversal of 1389556845 is 5486559831.

1389556845 is a `hidden beast` number, since 1 + 3 + 8 + 9 + 556 + 84 + 5 = 666.

It is not a de Polignac number, because 1389556845 - 2¹ = 1389556843 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1389556791 and 1389556800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389556843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 670249 + ... + 672318.

It is an arithmetic number, because the mean of its divisors is an integer number (104720304).

Almost surely, 2^1389556845 is an apocalyptic number.

1389556845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1389556845 is a deficient number, since it is larger than the sum of its proper divisors (1123730451).

1389556845 is a wasteful number, since it uses less digits than its factorization.

1389556845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342601 (or 1342598 counting only the distinct ones).

The product of its digits is 5184000, while the sum is 54.

The square root of 1389556845 is about 37276.7601194095. The cubic root of 1389556845 is about 1115.9004155369.

The spelling of 1389556845 in words is "one billion, three hundred eighty-nine million, five hundred fifty-six thousand, eight hundred forty-five".