28064749 has 2 divisors, whose sum is σ = 28064750. Its totient is φ = 28064748.

The previous prime is 28064747. The next prime is 28064789. The reversal of 28064749 is 94746082.

It is an a-pointer prime, because the next prime (28064789) can be obtained adding 28064749 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27227524 + 837225 = 5218^2 + 915^2 .

It is a cyclic number.

It is not a de Polignac number, because 28064749 - 2¹ = 28064747 is a prime.

Together with 28064747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28064747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14032374 + 14032375.

It is an arithmetic number, because the mean of its divisors is an integer number (14032375).

Almost surely, 2^28064749 is an apocalyptic number.

It is an amenable number.

28064749 is a deficient number, since it is larger than the sum of its proper divisors (1).

28064749 is an equidigital number, since it uses as much as digits as its factorization.

28064749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 28064749 is about 5297.6172945958. The cubic root of 28064749 is about 303.8927837802.

The spelling of 28064749 in words is "twenty-eight million, sixty-four thousand, seven hundred forty-nine".