442471738 has 4 divisors (see below), whose sum is σ = 663707610. Its totient is φ = 221235868.

The previous prime is 442471721. The next prime is 442471747. The reversal of 442471738 is 837174244.

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

It can be written as a sum of positive squares in only one way, i.e., 411968209 + 30503529 = 20297^2 + 5523^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 442471738.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 110617933 + ... + 110617936.

Almost surely, 2^442471738 is an apocalyptic number.

442471738 is a deficient number, since it is larger than the sum of its proper divisors (221235872).

442471738 is a wasteful number, since it uses less digits than its factorization.

442471738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221235871.

The product of its digits is 150528, while the sum is 40.

The square root of 442471738 is about 21035.0121939589. The cubic root of 442471738 is about 762.0120611295.

The spelling of 442471738 in words is "four hundred forty-two million, four hundred seventy-one thousand, seven hundred thirty-eight".