442856806 has 12 divisors (see below), whose sum is σ = 772740108. Its totient is φ = 189795732.

The previous prime is 442856803. The next prime is 442856833. The reversal of 442856806 is 608658244.

It is a super-2 number, since 2×442856806² = 392244301241043272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442856803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2259376 + ... + 2259571.

It is an arithmetic number, because the mean of its divisors is an integer number (64395009).

Almost surely, 2^442856806 is an apocalyptic number.

442856806 is a deficient number, since it is larger than the sum of its proper divisors (329883302).

442856806 is a wasteful number, since it uses less digits than its factorization.

442856806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4518963 (or 4518956 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 43.

The square root of 442856806 is about 21044.1632287910. The cubic root of 442856806 is about 762.2330480360.

The spelling of 442856806 in words is "four hundred forty-two million, eight hundred fifty-six thousand, eight hundred six".