428747 has 4 divisors (see below), whose sum is σ = 467736. Its totient is φ = 389760.

The previous prime is 428741. The next prime is 428759. The reversal of 428747 is 747824.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428747 - 2⁴ = 428731 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428741) 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, 19478 + ... + 19499.

It is an arithmetic number, because the mean of its divisors is an integer number (116934).

2⁴²⁸⁷⁴⁷ is an apocalyptic number.

428747 is a deficient number, since it is larger than the sum of its proper divisors (38989).

428747 is a wasteful number, since it uses less digits than its factorization.

428747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38988.

The product of its digits is 12544, while the sum is 32.

The square root of 428747 is about 654.7877518708. The cubic root of 428747 is about 75.4050382785.

It can be divided in two parts, 4287 and 47, that added together give a palindrome (4334).

The spelling of 428747 in words is "four hundred twenty-eight thousand, seven hundred forty-seven".