28153253 has 4 divisors (see below), whose sum is σ = 28538988. Its totient is φ = 27767520.

The previous prime is 28153249. The next prime is 28153259. The reversal of 28153253 is 35235182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35235182 = 2 ⋅17617591.

It can be written as a sum of positive squares in 2 ways, for example, as 23059204 + 5094049 = 4802^2 + 2257^2 .

It is a cyclic number.

It is not a de Polignac number, because 28153253 - 2² = 28153249 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 (28153259) 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, 192758 + ... + 192903.

It is an arithmetic number, because the mean of its divisors is an integer number (7134747).

Almost surely, 2^28153253 is an apocalyptic number.

It is an amenable number.

28153253 is a deficient number, since it is larger than the sum of its proper divisors (385735).

28153253 is an equidigital number, since it uses as much as digits as its factorization.

28153253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385734.

The product of its digits is 7200, while the sum is 29.

The square root of 28153253 is about 5305.9639086598. The cubic root of 28153253 is about 304.2118970790.

The spelling of 28153253 in words is "twenty-eight million, one hundred fifty-three thousand, two hundred fifty-three".