440042004 has 24 divisors (see below), whose sum is σ = 1140849920. Its totient is φ = 146680632.

The previous prime is 440041981. The next prime is 440042011. The reversal of 440042004 is 400240044.

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 an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2037124 + ... + 2037339.

Almost surely, 2^440042004 is an apocalyptic number.

It is an amenable number.

440042004 is an abundant number, since it is smaller than the sum of its proper divisors (700807916).

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

440042004 is a wasteful number, since it uses less digits than its factorization.

440042004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4074476 (or 4074468 counting only the distinct ones).

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

The square root of 440042004 is about 20977.1781705738. The cubic root of 440042004 is about 760.6146942935.

Adding to 440042004 its reverse (400240044), we get a palindrome (840282048).

The spelling of 440042004 in words is "four hundred forty million, forty-two thousand, four".