228402 has 12 divisors (see below), whose sum is σ = 494910. Its totient is φ = 76128.

The previous prime is 228383. The next prime is 228409. The reversal of 228402 is 204822.

228402 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 221841 + 6561 = 471^2 + 81^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12689 = 228402 / (2 + 2 + 8 + 4 + 0 + 2).

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (228409) by changing a digit.

228402 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6327 + ... + 6362.

2²²⁸⁴⁰² is an apocalyptic number.

228402 is an abundant number, since it is smaller than the sum of its proper divisors (266508).

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

228402 is a wasteful number, since it uses less digits than its factorization.

228402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12697 (or 12694 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 228402 is about 477.9142182442. The cubic root of 228402 is about 61.1270308081.

It can be divided in two parts, 228 and 402, that added together give a triangular number (630 = T₃₅).

The spelling of 228402 in words is "two hundred twenty-eight thousand, four hundred two".