442042004 has 12 divisors (see below), whose sum is σ = 775792500. Its totient is φ = 220387008.

The previous prime is 442041967. The next prime is 442042009. The reversal of 442042004 is 400240244.

It can be written as a sum of positive squares in 2 ways, for example, as 370639504 + 71402500 = 19252^2 + 8450^2 .

It is a super-2 number, since 2×442042004² = 390802266600672032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442042009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156929 + ... + 159720.

It is an arithmetic number, because the mean of its divisors is an integer number (64649375).

Almost surely, 2^442042004 is an apocalyptic number.

It is an amenable number.

442042004 is a deficient number, since it is larger than the sum of its proper divisors (333750496).

442042004 is a wasteful number, since it uses less digits than its factorization.

442042004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317002 (or 317000 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 20.

The square root of 442042004 is about 21024.7949811645. The cubic root of 442042004 is about 761.7652893909.

Adding to 442042004 its reverse (400240244), we get a palindrome (842282248).

The spelling of 442042004 in words is "four hundred forty-two million, forty-two thousand, four".