100530728 has 16 divisors (see below), whose sum is σ = 188602080. Its totient is φ = 50236848.

The previous prime is 100530713. The next prime is 100530743. The reversal of 100530728 is 827035001.

It is an interprime number because it is at equal distance from previous prime (100530713) and next prime (100530743).

It is a junction number, because it is equal to n+sod(n) for n = 100530697 and 100530706.

It is an unprimeable number.

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, 23525 + ... + 27467.

It is an arithmetic number, because the mean of its divisors is an integer number (11787630).

Almost surely, 2^100530728 is an apocalyptic number.

It is an amenable number.

100530728 is a deficient number, since it is larger than the sum of its proper divisors (88071352).

100530728 is a wasteful number, since it uses less digits than its factorization.

100530728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7136 (or 7132 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 100530728 is about 10026.5012840971. The cubic root of 100530728 is about 464.9785753416.

Adding to 100530728 its reverse (827035001), we get a palindrome (927565729).

The spelling of 100530728 in words is "one hundred million, five hundred thirty thousand, seven hundred twenty-eight".