28268741 has 4 divisors (see below), whose sum is σ = 28313484. Its totient is φ = 28224000.

The previous prime is 28268731. The next prime is 28268743. The reversal of 28268741 is 14786282.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27520516 + 748225 = 5246^2 + 865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28268741 - 2⁶ = 28268677 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28268695 and 28268704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28268743) 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, 21410 + ... + 22691.

It is an arithmetic number, because the mean of its divisors is an integer number (7078371).

Almost surely, 2^28268741 is an apocalyptic number.

It is an amenable number.

28268741 is a deficient number, since it is larger than the sum of its proper divisors (44743).

28268741 is an equidigital number, since it uses as much as digits as its factorization.

28268741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44742.

The product of its digits is 43008, while the sum is 38.

The square root of 28268741 is about 5316.8356190501. The cubic root of 28268741 is about 304.6273007397.

The spelling of 28268741 in words is "twenty-eight million, two hundred sixty-eight thousand, seven hundred forty-one".