28858868 has 6 divisors (see below), whose sum is σ = 50503026. Its totient is φ = 14429432.

The previous prime is 28858867. The next prime is 28858883. The reversal of 28858868 is 86885882.

It can be written as a sum of positive squares in only one way, i.e., 28858384 + 484 = 5372^2 + 22^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28858867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3607355 + ... + 3607362.

It is an arithmetic number, because the mean of its divisors is an integer number (8417171).

Almost surely, 2^28858868 is an apocalyptic number.

It is an amenable number.

28858868 is a deficient number, since it is larger than the sum of its proper divisors (21644158).

28858868 is a wasteful number, since it uses less digits than its factorization.

28858868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7214721 (or 7214719 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 53.

The square root of 28858868 is about 5372.0450482102. The cubic root of 28858868 is about 306.7324785241.

The spelling of 28858868 in words is "twenty-eight million, eight hundred fifty-eight thousand, eight hundred sixty-eight".