442821268 has 12 divisors (see below), whose sum is σ = 784274400. Its totient is φ = 218742872.

The previous prime is 442821259. The next prime is 442821283. The reversal of 442821268 is 862128244.

It is a congruent number.

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, 666568 + ... + 667231.

It is an arithmetic number, because the mean of its divisors is an integer number (65356200).

Almost surely, 2^442821268 is an apocalyptic number.

It is an amenable number.

442821268 is a deficient number, since it is larger than the sum of its proper divisors (341453132).

442821268 is a wasteful number, since it uses less digits than its factorization.

442821268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333886 (or 1333884 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 442821268 is about 21043.3188447070. The cubic root of 442821268 is about 762.2126584787.

The spelling of 442821268 in words is "four hundred forty-two million, eight hundred twenty-one thousand, two hundred sixty-eight".