100028 has 12 divisors (see below), whose sum is σ = 185472. Its totient is φ = 47040.

The previous prime is 100019. The next prime is 100043. The reversal of 100028 is 820001.

It is a junction number, because it is equal to n+sod(n) for n = 99991 and 100018.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 803.

It is an arithmetic number, because the mean of its divisors is an integer number (15456).

2¹⁰⁰⁰²⁸ is an apocalyptic number.

It is an amenable number.

100028 is a deficient number, since it is larger than the sum of its proper divisors (85444).

100028 is a wasteful number, since it uses less digits than its factorization.

100028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492 (or 1490 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100028 is about 316.2720348055. The cubic root of 100028 is about 46.4202200814.

Adding to 100028 its reverse (820001), we get a palindrome (920029).

The spelling of 100028 in words is "one hundred thousand, twenty-eight".