428291 has 4 divisors (see below), whose sum is σ = 434232. Its totient is φ = 422352.

The previous prime is 428273. The next prime is 428297. The reversal of 428291 is 192824.

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 428291 - 2⁶ = 428227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 428291.

It is not an unprimeable number, because it can be changed into a prime (428297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2861 + ... + 3006.

It is an arithmetic number, because the mean of its divisors is an integer number (108558).

2⁴²⁸²⁹¹ is an apocalyptic number.

428291 is a deficient number, since it is larger than the sum of its proper divisors (5941).

428291 is an equidigital number, since it uses as much as digits as its factorization.

428291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940.

The product of its digits is 1152, while the sum is 26.

The square root of 428291 is about 654.4394548008. The cubic root of 428291 is about 75.3782960935.

The spelling of 428291 in words is "four hundred twenty-eight thousand, two hundred ninety-one".