442621898 has 8 divisors (see below), whose sum is σ = 681877092. Its totient is φ = 215329536.

The previous prime is 442621897. The next prime is 442621931. The reversal of 442621898 is 898126244.

It can be written as a sum of positive squares in 2 ways, for example, as 424071649 + 18550249 = 20593^2 + 4307^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (442621897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2990615 + ... + 2990762.

Almost surely, 2^442621898 is an apocalyptic number.

442621898 is a deficient number, since it is larger than the sum of its proper divisors (239255194).

442621898 is a wasteful number, since it uses less digits than its factorization.

442621898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5981416.

The product of its digits is 221184, while the sum is 44.

The square root of 442621898 is about 21038.5811783970. The cubic root of 442621898 is about 762.0982517867.

The spelling of 442621898 in words is "four hundred forty-two million, six hundred twenty-one thousand, eight hundred ninety-eight".