28886864 has 20 divisors (see below), whose sum is σ = 56106900. Its totient is φ = 14407680.

The previous prime is 28886833. The next prime is 28886867. The reversal of 28886864 is 46868882.

It can be written as a sum of positive squares in 2 ways, for example, as 8456464 + 20430400 = 2908^2 + 4520^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28886867) 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, 5174 + ... + 9194.

It is an arithmetic number, because the mean of its divisors is an integer number (2805345).

Almost surely, 2^28886864 is an apocalyptic number.

It is an amenable number.

28886864 is a deficient number, since it is larger than the sum of its proper divisors (27220036).

28886864 is a wasteful number, since it uses less digits than its factorization.

28886864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4478 (or 4472 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 50.

The square root of 28886864 is about 5374.6501281479. The cubic root of 28886864 is about 306.8316335698.

The spelling of 28886864 in words is "twenty-eight million, eight hundred eighty-six thousand, eight hundred sixty-four".