100220628 has 12 divisors (see below), whose sum is σ = 233848160. Its totient is φ = 33406872.

The previous prime is 100220623. The next prime is 100220629. The reversal of 100220628 is 826022001.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-3 number, since 3×100220628³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100220623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4175848 + ... + 4175871.

Almost surely, 2^100220628 is an apocalyptic number.

It is an amenable number.

100220628 is an abundant number, since it is smaller than the sum of its proper divisors (133627532).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

100220628 is a wasteful number, since it uses less digits than its factorization.

100220628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8351726 (or 8351724 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 100220628 is about 10011.0253221136. The cubic root of 100220628 is about 464.4999874475.

Adding to 100220628 its reverse (826022001), we get a palindrome (926242629).

The spelling of 100220628 in words is "one hundred million, two hundred twenty thousand, six hundred twenty-eight".