28618253 has 4 divisors (see below), whose sum is σ = 29227200. Its totient is φ = 28009308.

The previous prime is 28618231. The next prime is 28618297. The reversal of 28618253 is 35281682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28618253 - 2⁸ = 28617997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28618223) 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 3 ways as a sum of consecutive naturals, for example, 304403 + ... + 304496.

It is an arithmetic number, because the mean of its divisors is an integer number (7306800).

Almost surely, 2^28618253 is an apocalyptic number.

It is an amenable number.

28618253 is a deficient number, since it is larger than the sum of its proper divisors (608947).

28618253 is an equidigital number, since it uses as much as digits as its factorization.

28618253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608946.

The product of its digits is 23040, while the sum is 35.

The square root of 28618253 is about 5349.6030693875. The cubic root of 28618253 is about 305.8776227580.

The spelling of 28618253 in words is "twenty-eight million, six hundred eighteen thousand, two hundred fifty-three".