447680778 has 8 divisors (see below), whose sum is σ = 895361568. Its totient is φ = 149226924.

The previous prime is 447680759. The next prime is 447680803. The reversal of 447680778 is 877086744.

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

447680778 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 447680778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37306726 + ... + 37306737.

It is an arithmetic number, because the mean of its divisors is an integer number (111920196).

Almost surely, 2^447680778 is an apocalyptic number.

447680778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

447680778 is a wasteful number, since it uses less digits than its factorization.

447680778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74613468.

The product of its (nonzero) digits is 2107392, while the sum is 51.

The square root of 447680778 is about 21158.4682337829. The cubic root of 447680778 is about 764.9906889379.

The spelling of 447680778 in words is "four hundred forty-seven million, six hundred eighty thousand, seven hundred seventy-eight".