28656812 has 6 divisors (see below), whose sum is σ = 50149428. Its totient is φ = 14328404.

The previous prime is 28656811. The next prime is 28656841. The reversal of 28656812 is 21865682.

It is not an unprimeable number, because it can be changed into a prime (28656811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3582098 + ... + 3582105.

It is an arithmetic number, because the mean of its divisors is an integer number (8358238).

Almost surely, 2^28656812 is an apocalyptic number.

It is an amenable number.

28656812 is a deficient number, since it is larger than the sum of its proper divisors (21492616).

28656812 is a wasteful number, since it uses less digits than its factorization.

28656812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7164207 (or 7164205 counting only the distinct ones).

The product of its digits is 46080, while the sum is 38.

The square root of 28656812 is about 5353.2057685092. The cubic root of 28656812 is about 306.0149365457.

The spelling of 28656812 in words is "twenty-eight million, six hundred fifty-six thousand, eight hundred twelve".