447640 has 48 divisors (see below), whose sum is σ = 1097280. Its totient is φ = 164160.

The previous prime is 447637. The next prime is 447641. The reversal of 447640 is 46744.

It is a happy number.

447640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14425 + ... + 14455.

It is an arithmetic number, because the mean of its divisors is an integer number (22860).

2⁴⁴⁷⁶⁴⁰ is an apocalyptic number.

447640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 447640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (548640).

447640 is an abundant number, since it is smaller than the sum of its proper divisors (649640).

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

447640 is a wasteful number, since it uses less digits than its factorization.

447640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 57 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 447640 is about 669.0590407430. The cubic root of 447640 is about 76.4967461273.

The spelling of 447640 in words is "four hundred forty-seven thousand, six hundred forty".