444002004 has 72 divisors (see below), whose sum is σ = 1154305152. Its totient is φ = 143821440.

The previous prime is 444002003. The next prime is 444002023. The reversal of 444002004 is 400200444.

It is a happy number.

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 (444002003) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 360069 + ... + 361299.

It is an arithmetic number, because the mean of its divisors is an integer number (16032016).

Almost surely, 2^444002004 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 444002004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577152576).

444002004 is an abundant number, since it is smaller than the sum of its proper divisors (710303148).

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

444002004 is a wasteful number, since it uses less digits than its factorization.

444002004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1517 (or 1512 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 444002004 is about 21071.3550584674. The cubic root of 444002004 is about 762.8895103526.

Adding to 444002004 its reverse (400200444), we get a palindrome (844202448).

The spelling of 444002004 in words is "four hundred forty-four million, two thousand, four".