28863652 has 12 divisors (see below), whose sum is σ = 50769180. Its totient is φ = 14358176.

The previous prime is 28863647. The next prime is 28863661. The reversal of 28863652 is 25636882.

It can be written as a sum of positive squares in 2 ways, for example, as 27815076 + 1048576 = 5274^2 + 1024^2 .

It is a super-2 number, since 2×28863652² = 1666220813554208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17527 + ... + 19102.

It is an arithmetic number, because the mean of its divisors is an integer number (4230765).

Almost surely, 2^28863652 is an apocalyptic number.

It is an amenable number.

28863652 is a deficient number, since it is larger than the sum of its proper divisors (21905528).

28863652 is a wasteful number, since it uses less digits than its factorization.

28863652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36830 (or 36828 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 28863652 is about 5372.4902978042. The cubic root of 28863652 is about 306.7494268338.

The spelling of 28863652 in words is "twenty-eight million, eight hundred sixty-three thousand, six hundred fifty-two".