428229 has 6 divisors (see below), whose sum is σ = 618566. Its totient is φ = 285480.

The previous prime is 428227. The next prime is 428231. The reversal of 428229 is 922824.

It is an interprime number because it is at equal distance from previous prime (428227) and next prime (428231).

It can be written as a sum of positive squares in only one way, i.e., 396900 + 31329 = 630^2 + 177^2 .

It is not a de Polignac number, because 428229 - 2¹ = 428227 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428221) 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, 23782 + ... + 23799.

2⁴²⁸²²⁹ is an apocalyptic number.

It is an amenable number.

428229 is a deficient number, since it is larger than the sum of its proper divisors (190337).

428229 is a wasteful number, since it uses less digits than its factorization.

428229 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47587 (or 47584 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 428229 is about 654.3920843042. The cubic root of 428229 is about 75.3746586290.

The spelling of 428229 in words is "four hundred twenty-eight thousand, two hundred twenty-nine".