442643308 has 12 divisors (see below), whose sum is σ = 775991160. Its totient is φ = 220931552.

The previous prime is 442643293. The next prime is 442643347. The reversal of 442643308 is 803346244.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 94966 + ... + 99517.

It is an arithmetic number, because the mean of its divisors is an integer number (64665930).

Almost surely, 2^442643308 is an apocalyptic number.

It is an amenable number.

442643308 is a deficient number, since it is larger than the sum of its proper divisors (333347852).

442643308 is a wasteful number, since it uses less digits than its factorization.

442643308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195056 (or 195054 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The square root of 442643308 is about 21039.0899993322. The cubic root of 442643308 is about 762.1105393702.

The spelling of 442643308 in words is "four hundred forty-two million, six hundred forty-three thousand, three hundred eight".