447808745 has 16 divisors (see below), whose sum is σ = 546461328. Its totient is φ = 352235520.

The previous prime is 447808727. The next prime is 447808763. The reversal of 447808745 is 547808744.

It is an interprime number because it is at equal distance from previous prime (447808727) and next prime (447808763).

It can be written as a sum of positive squares in 8 ways, for example, as 190096 + 447618649 = 436^2 + 21157^2 .

It is not a de Polignac number, because 447808745 - 2⁶ = 447808681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 447808745.

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 15 ways as a sum of consecutive naturals, for example, 73205 + ... + 79085.

It is an arithmetic number, because the mean of its divisors is an integer number (34153833).

Almost surely, 2^447808745 is an apocalyptic number.

It is an amenable number.

447808745 is a deficient number, since it is larger than the sum of its proper divisors (98652583).

447808745 is a wasteful number, since it uses less digits than its factorization.

447808745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6140.

The product of its (nonzero) digits is 1003520, while the sum is 47.

The square root of 447808745 is about 21161.4920315180. The cubic root of 447808745 is about 765.0635714041.

Subtracting 447808745 from its reverse (547808744), we obtain a palindrome (99999999).

The spelling of 447808745 in words is "four hundred forty-seven million, eight hundred eight thousand, seven hundred forty-five".