1389988144 has 10 divisors (see below), whose sum is σ = 2693102060. Its totient is φ = 694994064.

The previous prime is 1389988133. The next prime is 1389988157. The reversal of 1389988144 is 4418899831.

It is a happy number.

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, 43437114 + ... + 43437145.

It is an arithmetic number, because the mean of its divisors is an integer number (269310206).

Almost surely, 2^1389988144 is an apocalyptic number.

It is an amenable number.

1389988144 is a deficient number, since it is larger than the sum of its proper divisors (1303113916).

1389988144 is an equidigital number, since it uses as much as digits as its factorization.

1389988144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86874267 (or 86874261 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 55.

The square root of 1389988144 is about 37282.5447629316. The cubic root of 1389988144 is about 1116.0158568851.

The spelling of 1389988144 in words is "one billion, three hundred eighty-nine million, nine hundred eighty-eight thousand, one hundred forty-four".