28568628 has 72 divisors (see below), whose sum is σ = 82948320. Its totient is φ = 8199360.

The previous prime is 28568597. The next prime is 28568629. The reversal of 28568628 is 82686582.

28568628 is a `hidden beast` number, since 28 + 568 + 62 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28568629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5626 + ... + 9422.

It is an arithmetic number, because the mean of its divisors is an integer number (1152060).

Almost surely, 2^28568628 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28568628, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41474160).

28568628 is an abundant number, since it is smaller than the sum of its proper divisors (54379692).

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

28568628 is a wasteful number, since it uses less digits than its factorization.

28568628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837 (or 3832 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 28568628 is about 5344.9628623593. The cubic root of 28568628 is about 305.7007198186.

The spelling of 28568628 in words is "twenty-eight million, five hundred sixty-eight thousand, six hundred twenty-eight".