229428 has 18 divisors (see below), whose sum is σ = 580034. Its totient is φ = 76464.

The previous prime is 229423. The next prime is 229433. The reversal of 229428 is 824922.

229428 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (229423) and next prime (229433).

It can be written as a sum of positive squares in only one way, i.e., 219024 + 10404 = 468^2 + 102^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229423) 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, 3151 + ... + 3222.

2²²⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

229428 is an abundant number, since it is smaller than the sum of its proper divisors (350606).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

229428 is a wasteful number, since it uses less digits than its factorization.

229428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6383 (or 6378 counting only the distinct ones).

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

The square root of 229428 is about 478.9864298704. The cubic root of 229428 is about 61.2184232629.

The spelling of 229428 in words is "two hundred twenty-nine thousand, four hundred twenty-eight".