447990 has 32 divisors (see below), whose sum is σ = 1092960. Its totient is φ = 117504.

The previous prime is 447983. The next prime is 447991. The reversal of 447990 is 99744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447991) by changing a digit.

447990 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 (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3202 + ... + 3338.

It is an arithmetic number, because the mean of its divisors is an integer number (34155).

2⁴⁴⁷⁹⁹⁰ is an apocalyptic number.

447990 is an abundant number, since it is smaller than the sum of its proper divisors (644970).

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

447990 is a wasteful number, since it uses less digits than its factorization.

447990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256.

The product of its (nonzero) digits is 9072, while the sum is 33.

The square root of 447990 is about 669.3205510068. The cubic root of 447990 is about 76.5166779819.

The spelling of 447990 in words is "four hundred forty-seven thousand, nine hundred ninety".