1144440 has 144 divisors (see below), whose sum is σ = 4310280. Its totient is φ = 261120.

The previous prime is 1144439. The next prime is 1144441. The reversal of 1144440 is 444411.

It is an interprime number because it is at equal distance from previous prime (1144439) and next prime (1144441).

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 (1144441) 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 35 ways as a sum of consecutive naturals, for example, 67312 + ... + 67328.

2^1144440 is an apocalyptic number.

1144440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1144440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2155140).

1144440 is an abundant number, since it is smaller than the sum of its proper divisors (3165840).

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

1144440 is a wasteful number, since it uses less digits than its factorization.

1144440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62 (or 38 counting only the distinct ones).

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

The square root of 1144440 is about 1069.7850251336. The cubic root of 1144440 is about 104.5998374332.

Adding to 1144440 its reverse (444411), we get a palindrome (1588851).

It can be divided in two parts, 114 and 4440, that added together give a palindrome (4554).

The spelling of 1144440 in words is "one million, one hundred forty-four thousand, four hundred forty".