1389404 has 12 divisors (see below), whose sum is σ = 2440200. Its totient is φ = 692208.

The previous prime is 1389403. The next prime is 1389431. The reversal of 1389404 is 4049831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389403) 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 3 ways as a sum of consecutive naturals, for example, 1262 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (203350).

2^1389404 is an apocalyptic number.

It is an amenable number.

1389404 is a deficient number, since it is larger than the sum of its proper divisors (1050796).

1389404 is a wasteful number, since it uses less digits than its factorization.

1389404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1252 (or 1250 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 1389404 is about 1178.7298248539. The cubic root of 1389404 is about 111.5859499362.

The spelling of 1389404 in words is "one million, three hundred eighty-nine thousand, four hundred four".