447721172 has 12 divisors (see below), whose sum is σ = 794547936. Its totient is φ = 220707480.

The previous prime is 447721171. The next prime is 447721181. The reversal of 447721172 is 271127744.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447721171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787958 + ... + 788525.

It is an arithmetic number, because the mean of its divisors is an integer number (66212328).

Almost surely, 2^447721172 is an apocalyptic number.

It is an amenable number.

447721172 is a deficient number, since it is larger than the sum of its proper divisors (346826764).

447721172 is a wasteful number, since it uses less digits than its factorization.

447721172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576558 (or 1576556 counting only the distinct ones).

The product of its digits is 21952, while the sum is 35.

The square root of 447721172 is about 21159.4227709548. The cubic root of 447721172 is about 765.0136964811.

The spelling of 447721172 in words is "four hundred forty-seven million, seven hundred twenty-one thousand, one hundred seventy-two".