447778305 has 48 divisors (see below), whose sum is σ = 842377536. Its totient is φ = 218724480.

The previous prime is 447778297. The next prime is 447778321. The reversal of 447778305 is 503877744.

It is not a de Polignac number, because 447778305 - 2³ = 447778297 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 73714 + ... + 79556.

It is an arithmetic number, because the mean of its divisors is an integer number (17549532).

Almost surely, 2^447778305 is an apocalyptic number.

447778305 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

447778305 is a deficient number, since it is larger than the sum of its proper divisors (394599231).

447778305 is a wasteful number, since it uses less digits than its factorization.

447778305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5998 (or 5995 counting only the distinct ones).

The product of its (nonzero) digits is 658560, while the sum is 45.

The square root of 447778305 is about 21160.7727883459. The cubic root of 447778305 is about 765.0462358317.

The spelling of 447778305 in words is "four hundred forty-seven million, seven hundred seventy-eight thousand, three hundred five".