447920 has 40 divisors (see below), whose sum is σ = 1138320. Its totient is φ = 162560.

The previous prime is 447907. The next prime is 447943. The reversal of 447920 is 29744.

It is a tau number, because it is divible by the number of its divisors (40).

It is a self number, because there is not a number n which added to its sum of digits gives 447920.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 626 + ... + 1134.

It is an arithmetic number, because the mean of its divisors is an integer number (28458).

2⁴⁴⁷⁹²⁰ is an apocalyptic number.

447920 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 447920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (569160).

447920 is an abundant number, since it is smaller than the sum of its proper divisors (690400).

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

447920 is a wasteful number, since it uses less digits than its factorization.

447920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 527 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 447920 is about 669.2682571286. The cubic root of 447920 is about 76.5126924417.

The spelling of 447920 in words is "four hundred forty-seven thousand, nine hundred twenty".