28547819 has 2 divisors, whose sum is σ = 28547820. Its totient is φ = 28547818.

The previous prime is 28547801. The next prime is 28547821. The reversal of 28547819 is 91874582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28547819 - 2¹⁶ = 28482283 is a prime.

It is a super-2 number, since 2×28547819² = 1629955939313522, which contains 22 as substring.

Together with 28547821, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28547819.

It is not a weakly prime, because it can be changed into another prime (28547839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14273909 + 14273910.

It is an arithmetic number, because the mean of its divisors is an integer number (14273910).

Almost surely, 2^28547819 is an apocalyptic number.

28547819 is a deficient number, since it is larger than the sum of its proper divisors (1).

28547819 is an equidigital number, since it uses as much as digits as its factorization.

28547819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 161280, while the sum is 44.

The square root of 28547819 is about 5343.0159086419. The cubic root of 28547819 is about 305.6264790418.

The spelling of 28547819 in words is "twenty-eight million, five hundred forty-seven thousand, eight hundred nineteen".