447216885 has 12 divisors (see below), whose sum is σ = 775176012. Its totient is φ = 238515648.

The previous prime is 447216877. The next prime is 447216923. The reversal of 447216885 is 588612744.

It can be written as a sum of positive squares in 2 ways, for example, as 136258929 + 310957956 = 11673^2 + 17634^2 .

It is not a de Polignac number, because 447216885 - 2³ = 447216877 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 9938153 = 447216885 / (4 + 4 + 7 + 2 + 1 + 6 + 8 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 447216885.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4969032 + ... + 4969121.

It is an arithmetic number, because the mean of its divisors is an integer number (64598001).

Almost surely, 2^447216885 is an apocalyptic number.

447216885 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

447216885 is a deficient number, since it is larger than the sum of its proper divisors (327959127).

447216885 is a wasteful number, since it uses less digits than its factorization.

447216885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938164 (or 9938161 counting only the distinct ones).

The product of its digits is 430080, while the sum is 45.

The square root of 447216885 is about 21147.5030440948. The cubic root of 447216885 is about 764.7263663158.

The spelling of 447216885 in words is "four hundred forty-seven million, two hundred sixteen thousand, eight hundred eighty-five".