10128728 has 8 divisors (see below), whose sum is σ = 18991380. Its totient is φ = 5064360.

The previous prime is 10128721. The next prime is 10128731. The reversal of 10128728 is 82782101.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×10128728² = 205182261795968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10128728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10128721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 633038 + ... + 633053.

Almost surely, 2^10128728 is an apocalyptic number.

It is an amenable number.

10128728 is a deficient number, since it is larger than the sum of its proper divisors (8862652).

10128728 is a wasteful number, since it uses less digits than its factorization.

10128728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266097 (or 1266093 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 29.

The square root of 10128728 is about 3182.5662601115. The cubic root of 10128728 is about 216.3639839246.

The spelling of 10128728 in words is "ten million, one hundred twenty-eight thousand, seven hundred twenty-eight".