28606815 has 12 divisors (see below), whose sum is σ = 49585224. Its totient is φ = 15256944.

The previous prime is 28606811. The next prime is 28606817. The reversal of 28606815 is 51860682.

It is a happy number.

It is not a de Polignac number, because 28606815 - 2² = 28606811 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28606815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28606811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317809 + ... + 317898.

It is an arithmetic number, because the mean of its divisors is an integer number (4132102).

Almost surely, 2^28606815 is an apocalyptic number.

28606815 is a deficient number, since it is larger than the sum of its proper divisors (20978409).

28606815 is a wasteful number, since it uses less digits than its factorization.

28606815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 635718 (or 635715 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28606815 is about 5348.5339112695. The cubic root of 28606815 is about 305.8368667824.

The spelling of 28606815 in words is "twenty-eight million, six hundred six thousand, eight hundred fifteen".