100128868 has 12 divisors (see below), whose sum is σ = 200257792. Its totient is φ = 42912360.

The previous prime is 100128859. The next prime is 100128869. The reversal of 100128868 is 868821001.

100128868 is an admirable number.

It is a super-2 number, since 2×100128868² = 20051580413922848, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (100128869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1787988 + ... + 1788043.

Almost surely, 2^100128868 is an apocalyptic number.

It is an amenable number.

100128868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

100128868 is a wasteful number, since it uses less digits than its factorization.

100128868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3576042 (or 3576040 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 100128868 is about 10006.4413254663. The cubic root of 100128868 is about 464.3581818651.

Adding to 100128868 its reverse (868821001), we get a palindrome (968949869).

The spelling of 100128868 in words is "one hundred million, one hundred twenty-eight thousand, eight hundred sixty-eight".