1004440 has 16 divisors (see below), whose sum is σ = 2260080. Its totient is φ = 401760.

The previous prime is 1004429. The next prime is 1004441. The reversal of 1004440 is 444001.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1004440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1004441) 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, 12516 + ... + 12595.

It is an arithmetic number, because the mean of its divisors is an integer number (141255).

2^1004440 is an apocalyptic number.

1004440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1004440 is an abundant number, since it is smaller than the sum of its proper divisors (1255640).

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

1004440 is a wasteful number, since it uses less digits than its factorization.

1004440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25122 (or 25118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 1004440 is about 1002.2175412554. The cubic root of 1004440 is about 100.1477814987.

Adding to 1004440 its reverse (444001), we get a palindrome (1448441).

It can be divided in two parts, 1004 and 440, that added together give a square (1444 = 38²).

The spelling of 1004440 in words is "one million, four thousand, four hundred forty".