22020728 has 8 divisors (see below), whose sum is σ = 41288880. Its totient is φ = 11010360.

The previous prime is 22020709. The next prime is 22020749. The reversal of 22020728 is 82702022.

It is a happy number.

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

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, 1376288 + ... + 1376303.

It is an arithmetic number, because the mean of its divisors is an integer number (5161110).

Almost surely, 2^22020728 is an apocalyptic number.

It is an amenable number.

22020728 is a deficient number, since it is larger than the sum of its proper divisors (19268152).

22020728 is a wasteful number, since it uses less digits than its factorization.

22020728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752597 (or 2752593 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 22020728 is about 4692.6248518287. The cubic root of 22020728 is about 280.2919064594.

The spelling of 22020728 in words is "twenty-two million, twenty thousand, seven hundred twenty-eight".