100021828 has 24 divisors (see below), whose sum is σ = 179448192. Its totient is φ = 48759264.

The previous prime is 100021777. The next prime is 100021843. The reversal of 100021828 is 828120001.

It is a junction number, because it is equal to n+sod(n) for n = 100021799 and 100021808.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56850 + ... + 58582.

It is an arithmetic number, because the mean of its divisors is an integer number (7477008).

Almost surely, 2^100021828 is an apocalyptic number.

It is an amenable number.

100021828 is a deficient number, since it is larger than the sum of its proper divisors (79426364).

100021828 is a wasteful number, since it uses less digits than its factorization.

100021828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2091 (or 2089 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 100021828 is about 10001.0913404488. The cubic root of 100021828 is about 464.1926531047.

Adding to 100021828 its reverse (828120001), we get a palindrome (928141829).

The spelling of 100021828 in words is "one hundred million, twenty-one thousand, eight hundred twenty-eight".