447640845 has 8 divisors (see below), whose sum is σ = 716225376. Its totient is φ = 238741776.

The previous prime is 447640841. The next prime is 447640861. The reversal of 447640845 is 548046744.

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

It is not a de Polignac number, because 447640845 - 2² = 447640841 is a prime.

It is a super-2 number, since 2×447640845² = 400764652224628050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 447640797 and 447640806.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447640841) 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, 14921347 + ... + 14921376.

It is an arithmetic number, because the mean of its divisors is an integer number (89528172).

Almost surely, 2^447640845 is an apocalyptic number.

It is an amenable number.

447640845 is a deficient number, since it is larger than the sum of its proper divisors (268584531).

447640845 is a wasteful number, since it uses less digits than its factorization.

447640845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29842731.

The product of its (nonzero) digits is 430080, while the sum is 42.

The square root of 447640845 is about 21157.5245480184. The cubic root of 447640845 is about 764.9679426098.

The spelling of 447640845 in words is "four hundred forty-seven million, six hundred forty thousand, eight hundred forty-five".