447728533 has 16 divisors (see below), whose sum is σ = 533260800. Its totient is φ = 375588528.

The previous prime is 447728531. The next prime is 447728543. The reversal of 447728533 is 335827744.

It is not a de Polignac number, because 447728533 - 2¹ = 447728531 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 447728533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447728531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2235 + ... + 30007.

It is an arithmetic number, because the mean of its divisors is an integer number (33328800).

Almost surely, 2^447728533 is an apocalyptic number.

It is an amenable number.

447728533 is a deficient number, since it is larger than the sum of its proper divisors (85532267).

447728533 is an equidigital number, since it uses as much as digits as its factorization.

447728533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27841 (or 27827 counting only the distinct ones).

The product of its digits is 564480, while the sum is 43.

The square root of 447728533 is about 21159.5967116578. The cubic root of 447728533 is about 765.0178889974.

The spelling of 447728533 in words is "four hundred forty-seven million, seven hundred twenty-eight thousand, five hundred thirty-three".