100211728 has 10 divisors (see below), whose sum is σ = 194160254. Its totient is φ = 50105856.

The previous prime is 100211723. The next prime is 100211729. The reversal of 100211728 is 827112001.

It can be written as a sum of positive squares in only one way, i.e., 99760144 + 451584 = 9988^2 + 672^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100211699 and 100211708.

It is not an unprimeable number, because it can be changed into a prime (100211723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3131601 + ... + 3131632.

Almost surely, 2^100211728 is an apocalyptic number.

It is an amenable number.

100211728 is a deficient number, since it is larger than the sum of its proper divisors (93948526).

100211728 is an equidigital number, since it uses as much as digits as its factorization.

100211728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6263241 (or 6263235 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 100211728 is about 10010.5808023311. The cubic root of 100211728 is about 464.4862372101.

Adding to 100211728 its reverse (827112001), we get a palindrome (927323729).

The spelling of 100211728 in words is "one hundred million, two hundred eleven thousand, seven hundred twenty-eight".