28747253 has 4 divisors (see below), whose sum is σ = 29289708. Its totient is φ = 28204800.

The previous prime is 28747189. The next prime is 28747259. The reversal of 28747253 is 35274782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35274782 = 2 ⋅17637391.

It can be written as a sum of positive squares in 2 ways, for example, as 23020804 + 5726449 = 4798^2 + 2393^2 .

It is a cyclic number.

It is not a de Polignac number, because 28747253 - 2⁶ = 28747189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28747259) 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, 271148 + ... + 271253.

It is an arithmetic number, because the mean of its divisors is an integer number (7322427).

Almost surely, 2^28747253 is an apocalyptic number.

It is an amenable number.

28747253 is a deficient number, since it is larger than the sum of its proper divisors (542455).

28747253 is an equidigital number, since it uses as much as digits as its factorization.

28747253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542454.

The product of its digits is 94080, while the sum is 38.

The square root of 28747253 is about 5361.6464821918. The cubic root of 28747253 is about 306.3365265435.

The spelling of 28747253 in words is "twenty-eight million, seven hundred forty-seven thousand, two hundred fifty-three".