447128028621 has 24 divisors (see below), whose sum is σ = 662956351200. Its totient is φ = 290234591136.

The previous prime is 447128028547. The next prime is 447128028637. The reversal of 447128028621 is 126820821744.

447128028621 is a `hidden beast` number, since 4 + 4 + 7 + 12 + 8 + 0 + 2 + 8 + 621 = 666.

It is not a de Polignac number, because 447128028621 - 2¹⁰ = 447128027597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (447128018621) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1699671 + ... + 1945028.

It is an arithmetic number, because the mean of its divisors is an integer number (27623181300).

Almost surely, 2^447128028621 is an apocalyptic number.

It is an amenable number.

447128028621 is a deficient number, since it is larger than the sum of its proper divisors (215828322579).

447128028621 is a wasteful number, since it uses less digits than its factorization.

447128028621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3645065 (or 3645062 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 45.

The spelling of 447128028621 in words is "four hundred forty-seven billion, one hundred twenty-eight million, twenty-eight thousand, six hundred twenty-one".