28260812 has 12 divisors (see below), whose sum is σ = 50267616. Its totient is φ = 13898640.

The previous prime is 28260811. The next prime is 28260821. The reversal of 28260812 is 21806282.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28260811) 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, 57668 + ... + 58155.

It is an arithmetic number, because the mean of its divisors is an integer number (4188968).

Almost surely, 2^28260812 is an apocalyptic number.

It is an amenable number.

28260812 is a deficient number, since it is larger than the sum of its proper divisors (22006804).

28260812 is a wasteful number, since it uses less digits than its factorization.

28260812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115888 (or 115886 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 28260812 is about 5316.0899164706. The cubic root of 28260812 is about 304.5988167954.

The spelling of 28260812 in words is "twenty-eight million, two hundred sixty thousand, eight hundred twelve".