428347 has 4 divisors (see below), whose sum is σ = 430920. Its totient is φ = 425776.

The previous prime is 428339. The next prime is 428353. The reversal of 428347 is 743824.

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 428347 - 2³ = 428339 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428047) 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, 1018 + ... + 1375.

It is an arithmetic number, because the mean of its divisors is an integer number (107730).

2⁴²⁸³⁴⁷ is an apocalyptic number.

428347 is a deficient number, since it is larger than the sum of its proper divisors (2573).

428347 is a wasteful number, since it uses less digits than its factorization.

428347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2572.

The product of its digits is 5376, while the sum is 28.

The square root of 428347 is about 654.4822381089. The cubic root of 428347 is about 75.3815812436.

The spelling of 428347 in words is "four hundred twenty-eight thousand, three hundred forty-seven".