1022728 has 24 divisors (see below), whose sum is σ = 2231550. Its totient is φ = 438144.

The previous prime is 1022719. The next prime is 1022729. The reversal of 1022728 is 8272201.

1022728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 879844 + 142884 = 938^2 + 378^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1022699 and 1022708.

It is not an unprimeable number, because it can be changed into a prime (1022729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 913 + ... + 1696.

2^1022728 is an apocalyptic number.

It is an amenable number.

1022728 is an abundant number, since it is smaller than the sum of its proper divisors (1208822).

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

1022728 is a wasteful number, since it uses less digits than its factorization.

1022728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2629 (or 2618 counting only the distinct ones).

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

The square root of 1022728 is about 1011.3001532681. The cubic root of 1022728 is about 100.7519318140.

Adding to 1022728 its reverse (8272201), we get a palindrome (9294929).

The spelling of 1022728 in words is "one million, twenty-two thousand, seven hundred twenty-eight".