1389984 has 24 divisors (see below), whose sum is σ = 3648960. Its totient is φ = 463296.

The previous prime is 1389961. The next prime is 1389989. The reversal of 1389984 is 4899831.

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (1389989) 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, 7144 + ... + 7335.

It is an arithmetic number, because the mean of its divisors is an integer number (152040).

2^1389984 is an apocalyptic number.

It is an amenable number.

1389984 is an abundant number, since it is smaller than the sum of its proper divisors (2258976).

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

1389984 is a wasteful number, since it uses less digits than its factorization.

1389984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14492 (or 14484 counting only the distinct ones).

The product of its digits is 62208, while the sum is 42.

The square root of 1389984 is about 1178.9758267242. The cubic root of 1389984 is about 111.6014747817.

The spelling of 1389984 in words is "one million, three hundred eighty-nine thousand, nine hundred eighty-four".