447520 has 24 divisors (see below), whose sum is σ = 1057644. Its totient is φ = 178944.

The previous prime is 447509. The next prime is 447521. The reversal of 447520 is 25744.

It can be written as a sum of positive squares in 2 ways, for example, as 446224 + 1296 = 668^2 + 36^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 447491 and 447500.

It is not an unprimeable number, because it can be changed into a prime (447521) by changing a digit.

447520 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1239 + ... + 1558.

2⁴⁴⁷⁵²⁰ is an apocalyptic number.

447520 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

447520 is an abundant number, since it is smaller than the sum of its proper divisors (610124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

447520 is a wasteful number, since it uses less digits than its factorization.

447520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 447520 is about 668.9693565478. The cubic root of 447520 is about 76.4899099569.

It can be divided in two parts, 4 and 47520, that added together give a square (47524 = 218²).

The spelling of 447520 in words is "four hundred forty-seven thousand, five hundred twenty".