447725978 has 8 divisors (see below), whose sum is σ = 767530272. Its totient is φ = 191882556.

The previous prime is 447725977. The next prime is 447726007. The reversal of 447725978 is 879527744.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (447725977) 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, 15990200 + ... + 15990227.

It is an arithmetic number, because the mean of its divisors is an integer number (95941284).

Almost surely, 2^447725978 is an apocalyptic number.

447725978 is a deficient number, since it is larger than the sum of its proper divisors (319804294).

447725978 is a wasteful number, since it uses less digits than its factorization.

447725978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31980436.

The product of its digits is 3951360, while the sum is 53.

The square root of 447725978 is about 21159.5363370751. The cubic root of 447725978 is about 765.0164337820.

The spelling of 447725978 in words is "four hundred forty-seven million, seven hundred twenty-five thousand, nine hundred seventy-eight".