12020728 has 8 divisors (see below), whose sum is σ = 22538880. Its totient is φ = 6010360.

The previous prime is 12020713. The next prime is 12020731. The reversal of 12020728 is 82702021.

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

It is a junction number, because it is equal to n+sod(n) for n = 12020699 and 12020708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 751288 + ... + 751303.

It is an arithmetic number, because the mean of its divisors is an integer number (2817360).

Almost surely, 2^12020728 is an apocalyptic number.

It is an amenable number.

12020728 is a deficient number, since it is larger than the sum of its proper divisors (10518152).

12020728 is a wasteful number, since it uses less digits than its factorization.

12020728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1502597 (or 1502593 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The square root of 12020728 is about 3467.0921533758. The cubic root of 12020728 is about 229.0745928888.

Adding to 12020728 its reverse (82702021), we get a palindrome (94722749).

The spelling of 12020728 in words is "twelve million, twenty thousand, seven hundred twenty-eight".