22728548 has 6 divisors (see below), whose sum is σ = 39774966. Its totient is φ = 11364272.

The previous prime is 22728529. The next prime is 22728569. The reversal of 22728548 is 84582722.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 6390784 = 4042^2 + 2528^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2841065 + ... + 2841072.

It is an arithmetic number, because the mean of its divisors is an integer number (6629161).

Almost surely, 2^22728548 is an apocalyptic number.

It is an amenable number.

22728548 is a deficient number, since it is larger than the sum of its proper divisors (17046418).

22728548 is a wasteful number, since it uses less digits than its factorization.

22728548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5682141 (or 5682139 counting only the distinct ones).

The product of its digits is 71680, while the sum is 38.

The square root of 22728548 is about 4767.4466960838. The cubic root of 22728548 is about 283.2634654330.

The spelling of 22728548 in words is "twenty-two million, seven hundred twenty-eight thousand, five hundred forty-eight".