442344642 has 16 divisors (see below), whose sum is σ = 913228032. Its totient is φ = 142691760.

The previous prime is 442344631. The next prime is 442344649. The reversal of 442344642 is 246443244.

It is a happy number.

It is a super-2 number, since 2×442344642² = 391337564612216328, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (442344649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1188913 + ... + 1189284.

It is an arithmetic number, because the mean of its divisors is an integer number (57076752).

Almost surely, 2^442344642 is an apocalyptic number.

442344642 is an abundant number, since it is smaller than the sum of its proper divisors (470883390).

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

442344642 is a wasteful number, since it uses less digits than its factorization.

442344642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2378233.

The product of its digits is 73728, while the sum is 33.

The square root of 442344642 is about 21031.9909185983. The cubic root of 442344642 is about 761.9390937879.

Adding to 442344642 its reverse (246443244), we get a palindrome (688787886).

The spelling of 442344642 in words is "four hundred forty-two million, three hundred forty-four thousand, six hundred forty-two".