28764868 has 24 divisors (see below), whose sum is σ = 56810880. Its totient is φ = 12623520.

The previous prime is 28764863. The next prime is 28764871. The reversal of 28764868 is 86846782.

It is not an unprimeable number, because it can be changed into a prime (28764863) 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, 9996 + ... + 12547.

It is an arithmetic number, because the mean of its divisors is an integer number (2367120).

Almost surely, 2^28764868 is an apocalyptic number.

It is an amenable number.

28764868 is a deficient number, since it is larger than the sum of its proper divisors (28046012).

28764868 is a wasteful number, since it uses less digits than its factorization.

28764868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22587 (or 22585 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 49.

The square root of 28764868 is about 5363.2889163274. The cubic root of 28764868 is about 306.3990834323.

It can be divided in two parts, 2876 and 4868, that added together give a square (7744 = 88²).

The spelling of 28764868 in words is "twenty-eight million, seven hundred sixty-four thousand, eight hundred sixty-eight".