447978345 has 16 divisors (see below), whose sum is σ = 717102720. Its totient is φ = 238809344.

The previous prime is 447978331. The next prime is 447978359. The reversal of 447978345 is 543879744.

It is an interprime number because it is at equal distance from previous prime (447978331) and next prime (447978359).

It is a cyclic number.

It is not a de Polignac number, because 447978345 - 2¹¹ = 447976297 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33412 + ... + 44858.

It is an arithmetic number, because the mean of its divisors is an integer number (44818920).

Almost surely, 2^447978345 is an apocalyptic number.

It is an amenable number.

447978345 is a deficient number, since it is larger than the sum of its proper divisors (269124375).

447978345 is a wasteful number, since it uses less digits than its factorization.

447978345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14064.

The product of its digits is 3386880, while the sum is 51.

The square root of 447978345 is about 21165.4989310434. The cubic root of 447978345 is about 765.1601441827.

The spelling of 447978345 in words is "four hundred forty-seven million, nine hundred seventy-eight thousand, three hundred forty-five".