1989394 has 16 divisors (see below), whose sum is σ = 3361536. Its totient is φ = 874800.

The previous prime is 1989353. The next prime is 1989401. The reversal of 1989394 is 4939891.

1989394 = 60² + 61² + ... + 183².

It is a self number, because there is not a number n which added to its sum of digits gives 1989394.

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 in 7 ways as a sum of consecutive naturals, for example, 777 + ... + 2140.

It is an arithmetic number, because the mean of its divisors is an integer number (210096).

2^1989394 is an apocalyptic number.

1989394 is a deficient number, since it is larger than the sum of its proper divisors (1372142).

1989394 is a wasteful number, since it uses less digits than its factorization.

1989394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2961.

The product of its digits is 69984, while the sum is 43.

The square root of 1989394 is about 1410.4587906068. The cubic root of 1989394 is about 125.7689981006.

The spelling of 1989394 in words is "one million, nine hundred eighty-nine thousand, three hundred ninety-four".