28864766 has 24 divisors (see below), whose sum is σ = 50311920. Its totient is φ = 12166560.

The previous prime is 28864757. The next prime is 28864769. The reversal of 28864766 is 66746882.

It is a self number, because there is not a number n which added to its sum of digits gives 28864766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28864769) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70370 + ... + 70778.

It is an arithmetic number, because the mean of its divisors is an integer number (2096330).

Almost surely, 2^28864766 is an apocalyptic number.

28864766 is a deficient number, since it is larger than the sum of its proper divisors (21447154).

28864766 is an equidigital number, since it uses as much as digits as its factorization.

28864766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560 (or 489 counting only the distinct ones).

The product of its digits is 774144, while the sum is 47.

The square root of 28864766 is about 5372.5939731195. The cubic root of 28864766 is about 306.7533731405.

The spelling of 28864766 in words is "twenty-eight million, eight hundred sixty-four thousand, seven hundred sixty-six".