100228 has 6 divisors (see below), whose sum is σ = 175406. Its totient is φ = 50112.

The previous prime is 100213. The next prime is 100237. The reversal of 100228 is 822001.

It can be written as a sum of positive squares in only one way, i.e., 73984 + 26244 = 272^2 + 162^2 .

It is an unprimeable number.

100228 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12525 + ... + 12532.

2¹⁰⁰²²⁸ is an apocalyptic number.

It is an amenable number.

100228 is a deficient number, since it is larger than the sum of its proper divisors (75178).

100228 is a wasteful number, since it uses less digits than its factorization.

100228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25061 (or 25059 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 100228 is about 316.5880604192. The cubic root of 100228 is about 46.4511376354.

Adding to 100228 its reverse (822001), we get a palindrome (922229).

The spelling of 100228 in words is "one hundred thousand, two hundred twenty-eight".