440004 has 24 divisors (see below), whose sum is σ = 1055488. Its totient is φ = 142560.

The previous prime is 439991. The next prime is 440009. The reversal of 440004 is 400044.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (440009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52 + ... + 939.

2⁴⁴⁰⁰⁰⁴ is an apocalyptic number.

It is an amenable number.

440004 is an abundant number, since it is smaller than the sum of its proper divisors (615484).

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

440004 is a wasteful number, since it uses less digits than its factorization.

440004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1033 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 12.

The square root of 440004 is about 663.3279731777. The cubic root of 440004 is about 76.0592796965.

Adding to 440004 its reverse (400044), we get a palindrome (840048).

The spelling of 440004 in words is "four hundred forty thousand, four", and thus it is an iban number.