28303253 has 4 divisors (see below), whose sum is σ = 30876288. Its totient is φ = 25730220.

The previous prime is 28303237. The next prime is 28303273. The reversal of 28303253 is 35230382.

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 28303253 - 2⁴ = 28303237 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 (28303273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1286501 + ... + 1286522.

It is an arithmetic number, because the mean of its divisors is an integer number (7719072).

Almost surely, 2^28303253 is an apocalyptic number.

It is an amenable number.

28303253 is a deficient number, since it is larger than the sum of its proper divisors (2573035).

28303253 is a wasteful number, since it uses less digits than its factorization.

28303253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573034.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 28303253 is about 5320.0801685689. The cubic root of 28303253 is about 304.7512187911.

The spelling of 28303253 in words is "twenty-eight million, three hundred three thousand, two hundred fifty-three".