28282815 has 48 divisors (see below), whose sum is σ = 56642976. Its totient is φ = 12902400.

The previous prime is 28282741. The next prime is 28282817. The reversal of 28282815 is 51828282.

It is a happy number.

It is not a de Polignac number, because 28282815 - 2¹⁰ = 28281791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28282815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28282817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6735 + ... + 10095.

It is an arithmetic number, because the mean of its divisors is an integer number (1180062).

Almost surely, 2^28282815 is an apocalyptic number.

28282815 is an abundant number, since it is smaller than the sum of its proper divisors (28360161).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28282815 is a wasteful number, since it uses less digits than its factorization.

28282815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3400 (or 3397 counting only the distinct ones).

The product of its digits is 20480, while the sum is 36.

The square root of 28282815 is about 5318.1589859650. The cubic root of 28282815 is about 304.6778467159.

The spelling of 28282815 in words is "twenty-eight million, two hundred eighty-two thousand, eight hundred fifteen".