428293 has 4 divisors (see below), whose sum is σ = 436428. Its totient is φ = 420160.

The previous prime is 428273. The next prime is 428297. The reversal of 428293 is 392824.

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

It can be written as a sum of positive squares in 2 ways, for example, as 228484 + 199809 = 478^2 + 447^2 .

It is a cyclic number.

It is not a de Polignac number, because 428293 - 2⁹ = 427781 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 (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, 3988 + ... + 4093.

It is an arithmetic number, because the mean of its divisors is an integer number (109107).

2⁴²⁸²⁹³ is an apocalyptic number.

It is an amenable number.

428293 is a deficient number, since it is larger than the sum of its proper divisors (8135).

428293 is an equidigital number, since it uses as much as digits as its factorization.

428293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8134.

The product of its digits is 3456, while the sum is 28.

The square root of 428293 is about 654.4409828243. The cubic root of 428293 is about 75.3784134252.

The spelling of 428293 in words is "four hundred twenty-eight thousand, two hundred ninety-three".