1389556844 has 24 divisors (see below), whose sum is σ = 2622806928. Its totient is φ = 640347840.

The previous prime is 1389556843. The next prime is 1389556853. The reversal of 1389556844 is 4486559831.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14159 + ... + 54585.

It is an arithmetic number, because the mean of its divisors is an integer number (109283622).

Almost surely, 2^1389556844 is an apocalyptic number.

It is an amenable number.

1389556844 is a deficient number, since it is larger than the sum of its proper divisors (1233250084).

1389556844 is a wasteful number, since it uses less digits than its factorization.

1389556844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41105 (or 41103 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 53.

The square root of 1389556844 is about 37276.7601059963. The cubic root of 1389556844 is about 1115.9004152692.

The spelling of 1389556844 in words is "one billion, three hundred eighty-nine million, five hundred fifty-six thousand, eight hundred forty-four".