28030253 has 4 divisors (see below), whose sum is σ = 28060800. Its totient is φ = 27999708.

The previous prime is 28030241. The next prime is 28030267. The reversal of 28030253 is 35203082.

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 28030253 - 2⁴ = 28030237 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 (28030213) 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, 13853 + ... + 15746.

It is an arithmetic number, because the mean of its divisors is an integer number (7015200).

Almost surely, 2^28030253 is an apocalyptic number.

It is an amenable number.

28030253 is a deficient number, since it is larger than the sum of its proper divisors (30547).

28030253 is an equidigital number, since it uses as much as digits as its factorization.

28030253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30546.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 28030253 is about 5294.3604901820. The cubic root of 28030253 is about 303.7682220210.

The spelling of 28030253 in words is "twenty-eight million, thirty thousand, two hundred fifty-three".