442020404 has 12 divisors (see below), whose sum is σ = 884040864. Its totient is φ = 189437304.

The previous prime is 442020353. The next prime is 442020409. The reversal of 442020404 is 404020244.

442020404 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442020409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7893194 + ... + 7893249.

It is an arithmetic number, because the mean of its divisors is an integer number (73670072).

Almost surely, 2^442020404 is an apocalyptic number.

It is an amenable number.

442020404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

442020404 is a wasteful number, since it uses less digits than its factorization.

442020404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15786454 (or 15786452 counting only the distinct ones).

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

The square root of 442020404 is about 21024.2812956829. The cubic root of 442020404 is about 761.7528815216.

Adding to 442020404 its reverse (404020244), we get a palindrome (846040648).

The spelling of 442020404 in words is "four hundred forty-two million, twenty thousand, four hundred four".