28200265 has 8 divisors (see below), whose sum is σ = 34304328. Its totient is φ = 22250880.

The previous prime is 28200241. The next prime is 28200281. The reversal of 28200265 is 56200282.

It can be written as a sum of positive squares in 4 ways, for example, as 6335289 + 21864976 = 2517^2 + 4676^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28200265 - 2¹¹ = 28198217 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 38266 + ... + 38995.

It is an arithmetic number, because the mean of its divisors is an integer number (4288041).

Almost surely, 2^28200265 is an apocalyptic number.

It is an amenable number.

28200265 is a deficient number, since it is larger than the sum of its proper divisors (6104063).

28200265 is an equidigital number, since it uses as much as digits as its factorization.

28200265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77339.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 28200265 is about 5310.3921700756. The cubic root of 28200265 is about 304.3811333719.

The spelling of 28200265 in words is "twenty-eight million, two hundred thousand, two hundred sixty-five".