228308 has 6 divisors (see below), whose sum is σ = 399546. Its totient is φ = 114152.

The previous prime is 228307. The next prime is 228311. The reversal of 228308 is 803822.

It can be written as a sum of positive squares in only one way, i.e., 169744 + 58564 = 412^2 + 242^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (228301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28535 + ... + 28542.

It is an arithmetic number, because the mean of its divisors is an integer number (66591).

2²²⁸³⁰⁸ is an apocalyptic number.

It is an amenable number.

228308 is a deficient number, since it is larger than the sum of its proper divisors (171238).

228308 is a wasteful number, since it uses less digits than its factorization.

228308 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57081 (or 57079 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 228308 is about 477.8158641150. The cubic root of 228308 is about 61.1186439444.

It can be divided in two parts, 2 and 28308, that multiplied together give a triangular number (56616 = T₃₃₆).

The spelling of 228308 in words is "two hundred twenty-eight thousand, three hundred eight".