28826865 has 24 divisors (see below), whose sum is σ = 50417640. Its totient is φ = 15235584.

The previous prime is 28826851. The next prime is 28826873. The reversal of 28826865 is 56862882.

It can be written as a sum of positive squares in 4 ways, for example, as 567009 + 28259856 = 753^2 + 5316^2 .

It is not a de Polignac number, because 28826865 - 2⁶ = 28826801 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28826865.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2251 + ... + 7919.

It is an arithmetic number, because the mean of its divisors is an integer number (2100735).

Almost surely, 2^28826865 is an apocalyptic number.

It is an amenable number.

28826865 is a deficient number, since it is larger than the sum of its proper divisors (21590775).

28826865 is a wasteful number, since it uses less digits than its factorization.

28826865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5793 (or 5790 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 28826865 is about 5369.0655611568. The cubic root of 28826865 is about 306.6190530731.

The spelling of 28826865 in words is "twenty-eight million, eight hundred twenty-six thousand, eight hundred sixty-five".