428817447 has 6 divisors (see below), whose sum is σ = 619402992. Its totient is φ = 285878292.

The previous prime is 428817437. The next prime is 428817449. The reversal of 428817447 is 744718824.

It is not a de Polignac number, because 428817447 - 2¹¹ = 428815399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428817449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23823183 + ... + 23823200.

It is an arithmetic number, because the mean of its divisors is an integer number (103233832).

Almost surely, 2^428817447 is an apocalyptic number.

428817447 is a deficient number, since it is larger than the sum of its proper divisors (190585545).

428817447 is a wasteful number, since it uses less digits than its factorization.

428817447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47646389 (or 47646386 counting only the distinct ones).

The product of its digits is 401408, while the sum is 45.

The square root of 428817447 is about 20707.9078373456. The cubic root of 428817447 is about 754.0916796166.

The spelling of 428817447 in words is "four hundred twenty-eight million, eight hundred seventeen thousand, four hundred forty-seven".