10021728 has 24 divisors (see below), whose sum is σ = 26307288. Its totient is φ = 3340544.

The previous prime is 10021723. The next prime is 10021741. The reversal of 10021728 is 82712001.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021723) 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 in 3 ways as a sum of consecutive naturals, for example, 52101 + ... + 52292.

It is an arithmetic number, because the mean of its divisors is an integer number (1096137).

Almost surely, 2^10021728 is an apocalyptic number.

It is an amenable number.

10021728 is an abundant number, since it is smaller than the sum of its proper divisors (16285560).

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

10021728 is a wasteful number, since it uses less digits than its factorization.

10021728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104406 (or 104398 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 10021728 is about 3165.7112944803. The cubic root of 10021728 is about 215.5993946491.

Adding to 10021728 its reverse (82712001), we get a palindrome (92733729).

The spelling of 10021728 in words is "ten million, twenty-one thousand, seven hundred twenty-eight".