161228 has 12 divisors (see below), whose sum is σ = 298872. Its totient is φ = 75840.

The previous prime is 161221. The next prime is 161233. The reversal of 161228 is 822161.

It is not an unprimeable number, because it can be changed into a prime (161221) by changing a digit.

161228 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 3 ways as a sum of consecutive naturals, for example, 1118 + ... + 1253.

It is an arithmetic number, because the mean of its divisors is an integer number (24906).

2¹⁶¹²²⁸ is an apocalyptic number.

It is an amenable number.

161228 is a deficient number, since it is larger than the sum of its proper divisors (137644).

161228 is a wasteful number, since it uses less digits than its factorization.

161228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2392 (or 2390 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 161228 is about 401.5320659673. The cubic root of 161228 is about 54.4268862196.

Adding to 161228 its reverse (822161), we get a palindrome (983389).

The spelling of 161228 in words is "one hundred sixty-one thousand, two hundred twenty-eight".