28395749 has 2 divisors, whose sum is σ = 28395750. Its totient is φ = 28395748.

The previous prime is 28395743. The next prime is 28395751. The reversal of 28395749 is 94759382.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21687649 + 6708100 = 4657^2 + 2590^2 .

It is a cyclic number.

It is not a de Polignac number, because 28395749 - 2⁴ = 28395733 is a prime.

It is a super-2 number, since 2×28395749² = 1612637122542002, which contains 22 as substring.

Together with 28395751, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28395743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14197874 + 14197875.

It is an arithmetic number, because the mean of its divisors is an integer number (14197875).

Almost surely, 2^28395749 is an apocalyptic number.

It is an amenable number.

28395749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28395749 is an equidigital number, since it uses as much as digits as its factorization.

28395749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 28395749 is about 5328.7661798957. The cubic root of 28395749 is about 305.0828369461.

The spelling of 28395749 in words is "twenty-eight million, three hundred ninety-five thousand, seven hundred forty-nine".