28001747 has 2 divisors, whose sum is σ = 28001748. Its totient is φ = 28001746.

The previous prime is 28001731. The next prime is 28001749. The reversal of 28001747 is 74710082.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28001747 - 2⁴ = 28001731 is a prime.

Together with 28001749, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (28001749) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14000873 + 14000874.

It is an arithmetic number, because the mean of its divisors is an integer number (14000874).

Almost surely, 2^28001747 is an apocalyptic number.

28001747 is a deficient number, since it is larger than the sum of its proper divisors (1).

28001747 is an equidigital number, since it uses as much as digits as its factorization.

28001747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 29.

The square root of 28001747 is about 5291.6676955380. The cubic root of 28001747 is about 303.6652124383.

The spelling of 28001747 in words is "twenty-eight million, one thousand, seven hundred forty-seven".