28253365 has 16 divisors (see below), whose sum is σ = 39650688. Its totient is φ = 18922176.

The previous prime is 28253363. The next prime is 28253377. The reversal of 28253365 is 56335282.

It is a happy number.

It is not a de Polignac number, because 28253365 - 2¹ = 28253363 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28253365.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28253363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7882 + ... + 10891.

It is an arithmetic number, because the mean of its divisors is an integer number (2478168).

Almost surely, 2^28253365 is an apocalyptic number.

It is an amenable number.

28253365 is a deficient number, since it is larger than the sum of its proper divisors (11397323).

28253365 is a wasteful number, since it uses less digits than its factorization.

28253365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18828.

The product of its digits is 43200, while the sum is 34.

The square root of 28253365 is about 5315.3894495136. The cubic root of 28253365 is about 304.5720595239.

The spelling of 28253365 in words is "twenty-eight million, two hundred fifty-three thousand, three hundred sixty-five".