28868772 has 24 divisors (see below), whose sum is σ = 70289856. Its totient is φ = 9204448.

The previous prime is 28868761. The next prime is 28868773. The reversal of 28868772 is 27786882.

It is not an unprimeable number, because it can be changed into a prime (28868773) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52023 + ... + 52574.

It is an arithmetic number, because the mean of its divisors is an integer number (2928744).

Almost surely, 2^28868772 is an apocalyptic number.

It is an amenable number.

28868772 is an abundant number, since it is smaller than the sum of its proper divisors (41421084).

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

28868772 is a wasteful number, since it uses less digits than its factorization.

28868772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104627 (or 104625 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28868772 is about 5372.9667782334. The cubic root of 28868772 is about 306.7675634186.

The spelling of 28868772 in words is "twenty-eight million, eight hundred sixty-eight thousand, seven hundred seventy-two".