1989382 has 4 divisors (see below), whose sum is σ = 2984076. Its totient is φ = 994690.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989382 is 2839891.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2839891 = 439 ⋅6469.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 497344 + ... + 497347.

It is an arithmetic number, because the mean of its divisors is an integer number (746019).

2^1989382 is an apocalyptic number.

1989382 is a deficient number, since it is larger than the sum of its proper divisors (994694).

1989382 is an equidigital number, since it uses as much as digits as its factorization.

1989382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994693.

The product of its digits is 31104, while the sum is 40.

The square root of 1989382 is about 1410.4545366654. The cubic root of 1989382 is about 125.7687452211.

It can be divided in two parts, 19 and 89382, that added together give a square (89401 = 299²).

The spelling of 1989382 in words is "one million, nine hundred eighty-nine thousand, three hundred eighty-two".