1984389 has 8 divisors (see below), whose sum is σ = 2886432. Its totient is φ = 1202640.

The previous prime is 1984363. The next prime is 1984397. The reversal of 1984389 is 9834891.

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

It is not a de Polignac number, because 1984389 - 2⁷ = 1984261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1984389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1984309) 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, 30034 + ... + 30099.

It is an arithmetic number, because the mean of its divisors is an integer number (360804).

2^1984389 is an apocalyptic number.

It is an amenable number.

1984389 is a deficient number, since it is larger than the sum of its proper divisors (902043).

1984389 is a wasteful number, since it uses less digits than its factorization.

1984389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60147.

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

The square root of 1984389 is about 1408.6834278858. The cubic root of 1984389 is about 125.6634379049.

Multiplying 1984389 by its sum of digits (42), we get a palindrome (83344338).

The spelling of 1984389 in words is "one million, nine hundred eighty-four thousand, three hundred eighty-nine".