28564628 has 12 divisors (see below), whose sum is σ = 50040480. Its totient is φ = 14267352.

The previous prime is 28564621. The next prime is 28564687. The reversal of 28564628 is 82646582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28564621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1313 + ... + 7671.

It is an arithmetic number, because the mean of its divisors is an integer number (4170040).

Almost surely, 2^28564628 is an apocalyptic number.

It is an amenable number.

28564628 is a deficient number, since it is larger than the sum of its proper divisors (21475852).

28564628 is a wasteful number, since it uses less digits than its factorization.

28564628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7486 (or 7484 counting only the distinct ones).

The product of its digits is 184320, while the sum is 41.

The square root of 28564628 is about 5344.5886651828. The cubic root of 28564628 is about 305.6864517206.

It can be divided in two parts, 28564 and 628, that added together give a palindrome (29192).

The spelling of 28564628 in words is "twenty-eight million, five hundred sixty-four thousand, six hundred twenty-eight".