28657568 has 24 divisors (see below), whose sum is σ = 58366980. Its totient is φ = 13834240.

The previous prime is 28657561. The next prime is 28657627. The reversal of 28657568 is 86575682.

It can be written as a sum of positive squares in 2 ways, for example, as 25928464 + 2729104 = 5092^2 + 1652^2 .

It is not an unprimeable number, because it can be changed into a prime (28657561) 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, 14513 + ... + 16368.

Almost surely, 2^28657568 is an apocalyptic number.

It is an amenable number.

28657568 is an abundant number, since it is smaller than the sum of its proper divisors (29709412).

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

28657568 is a wasteful number, since it uses less digits than its factorization.

28657568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30920 (or 30912 counting only the distinct ones).

The product of its digits is 806400, while the sum is 47.

The square root of 28657568 is about 5353.2763799378. The cubic root of 28657568 is about 306.0176275319.

The spelling of 28657568 in words is "twenty-eight million, six hundred fifty-seven thousand, five hundred sixty-eight".