1439889 has 8 divisors (see below), whose sum is σ = 2094432. Its totient is φ = 872640.

The previous prime is 1439881. The next prime is 1439891. The reversal of 1439889 is 9889341.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1439889 - 2³ = 1439881 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1439889.

It is not an unprimeable number, because it can be changed into a prime (1439881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21784 + ... + 21849.

It is an arithmetic number, because the mean of its divisors is an integer number (261804).

2^1439889 is an apocalyptic number.

It is an amenable number.

1439889 is a deficient number, since it is larger than the sum of its proper divisors (654543).

1439889 is a wasteful number, since it uses less digits than its factorization.

1439889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43647.

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

The square root of 1439889 is about 1199.9537491087. The cubic root of 1439889 is about 112.9214218634.

It can be divided in two parts, 14 and 39889, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 1439889 in words is "one million, four hundred thirty-nine thousand, eight hundred eighty-nine".