447811438 has 4 divisors (see below), whose sum is σ = 671717160. Its totient is φ = 223905718.

The previous prime is 447811411. The next prime is 447811439. The reversal of 447811438 is 834118744.

It is a happy number.

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

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 447811438.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447811439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111952858 + ... + 111952861.

It is an arithmetic number, because the mean of its divisors is an integer number (167929290).

Almost surely, 2^447811438 is an apocalyptic number.

447811438 is a deficient number, since it is larger than the sum of its proper divisors (223905722).

447811438 is a wasteful number, since it uses less digits than its factorization.

447811438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223905721.

The product of its digits is 86016, while the sum is 40.

The square root of 447811438 is about 21161.5556611512. Note that the first 3 decimals coincide. The cubic root of 447811438 is about 765.0651050291.

The spelling of 447811438 in words is "four hundred forty-seven million, eight hundred eleven thousand, four hundred thirty-eight".