1140444 has 36 divisors (see below), whose sum is σ = 2926560. Its totient is φ = 374400.

The previous prime is 1140439. The next prime is 1140449. The reversal of 1140444 is 4440411.

It is an interprime number because it is at equal distance from previous prime (1140439) and next prime (1140449).

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

It is a super-2 number, since 2×1140444² = 2601225034272, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140449) 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 11 ways as a sum of consecutive naturals, for example, 2644 + ... + 3044.

2^1140444 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 1140444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1463280).

1140444 is an abundant number, since it is smaller than the sum of its proper divisors (1786116).

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

1140444 is a wasteful number, since it uses less digits than its factorization.

1140444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 485 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 1140444 is about 1067.9157270122. The cubic root of 1140444 is about 104.4779529659.

Adding to 1140444 its reverse (4440411), we get a palindrome (5580855).

The spelling of 1140444 in words is "one million, one hundred forty thousand, four hundred forty-four".