1320444 has 36 divisors (see below), whose sum is σ = 3419416. Its totient is φ = 429408.

The previous prime is 1320437. The next prime is 1320533. The reversal of 1320444 is 4440231.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

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 in 11 ways as a sum of consecutive naturals, for example, 1122 + ... + 1974.

2^1320444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1320444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1709708).

1320444 is an abundant number, since it is smaller than the sum of its proper divisors (2098972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1320444 is a wasteful number, since it uses less digits than its factorization.

1320444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 901 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 1320444 is about 1149.1057392599. The cubic root of 1320444 is about 109.7084289331.

Adding to 1320444 its reverse (4440231), we get a palindrome (5760675).

It can be divided in two parts, 1320 and 444, that added together give a square (1764 = 42²).

The spelling of 1320444 in words is "one million, three hundred twenty thousand, four hundred forty-four".