447807280 has 40 divisors (see below), whose sum is σ = 1042044912. Its totient is φ = 178969344.

The previous prime is 447807277. The next prime is 447807281. The reversal of 447807280 is 82708744.

It is a happy number.

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

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (447807281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 158359 + ... + 161161.

Almost surely, 2^447807280 is an apocalyptic number.

447807280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

447807280 is an abundant number, since it is smaller than the sum of its proper divisors (594237632).

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

447807280 is a wasteful number, since it uses less digits than its factorization.

447807280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4813 (or 4807 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 40.

The square root of 447807280 is about 21161.4574167282. The cubic root of 447807280 is about 765.0627371050.

The spelling of 447807280 in words is "four hundred forty-seven million, eight hundred seven thousand, two hundred eighty".