447991916 has 12 divisors (see below), whose sum is σ = 784135632. Its totient is φ = 223953168.

The previous prime is 447991909. The next prime is 447991927. The reversal of 447991916 is 619199744.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30401 + ... + 42663.

It is an arithmetic number, because the mean of its divisors is an integer number (65344636).

Almost surely, 2^447991916 is an apocalyptic number.

It is an amenable number.

447991916 is a deficient number, since it is larger than the sum of its proper divisors (336143716).

447991916 is a wasteful number, since it uses less digits than its factorization.

447991916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21400 (or 21398 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 447991916 is about 21165.8195211052. The cubic root of 447991916 is about 765.1678706599.

The spelling of 447991916 in words is "four hundred forty-seven million, nine hundred ninety-one thousand, nine hundred sixteen".