442304140 has 24 divisors (see below), whose sum is σ = 929284272. Its totient is φ = 176836800.

The previous prime is 442304131. The next prime is 442304141. The reversal of 442304140 is 41403244.

It is a super-2 number, since 2×442304140² = 391265904522279200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442304141) 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 7 ways as a sum of consecutive naturals, for example, 53142 + ... + 60898.

It is an arithmetic number, because the mean of its divisors is an integer number (38720178).

Almost surely, 2^442304140 is an apocalyptic number.

It is an amenable number.

442304140 is an abundant number, since it is smaller than the sum of its proper divisors (486980132).

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

442304140 is a wasteful number, since it uses less digits than its factorization.

442304140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10617 (or 10615 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 442304140 is about 21031.0280300322. The cubic root of 442304140 is about 761.9158381661.

Adding to 442304140 its reverse (41403244), we get a palindrome (483707384).

The spelling of 442304140 in words is "four hundred forty-two million, three hundred four thousand, one hundred forty".