28384787 has 2 divisors, whose sum is σ = 28384788. Its totient is φ = 28384786.

The previous prime is 28384753. The next prime is 28384789. The reversal of 28384787 is 78748382.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28384787 - 2¹⁰ = 28383763 is a prime.

It is a super-2 number, since 2×28384787² = 1611392266070738, which contains 22 as substring.

Together with 28384789, 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 (28384789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14192393 + 14192394.

It is an arithmetic number, because the mean of its divisors is an integer number (14192394).

Almost surely, 2^28384787 is an apocalyptic number.

28384787 is a deficient number, since it is larger than the sum of its proper divisors (1).

28384787 is an equidigital number, since it uses as much as digits as its factorization.

28384787 is an evil number, because the sum of its binary digits is even.

The product of its digits is 602112, while the sum is 47.

The square root of 28384787 is about 5327.7375123029. The cubic root of 28384787 is about 305.0435734575.

The spelling of 28384787 in words is "twenty-eight million, three hundred eighty-four thousand, seven hundred eighty-seven".