442315606 has 4 divisors (see below), whose sum is σ = 663473412. Its totient is φ = 221157802.

The previous prime is 442315603. The next prime is 442315607. The reversal of 442315606 is 606513244.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×442315606² = 391286190622294472, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442315603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110578900 + ... + 110578903.

It is an arithmetic number, because the mean of its divisors is an integer number (165868353).

Almost surely, 2^442315606 is an apocalyptic number.

442315606 is a deficient number, since it is larger than the sum of its proper divisors (221157806).

442315606 is a wasteful number, since it uses less digits than its factorization.

442315606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221157805.

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 442315606 is about 21031.3006254963. The cubic root of 442315606 is about 761.9224219100.

The spelling of 442315606 in words is "four hundred forty-two million, three hundred fifteen thousand, six hundred six".