28070047 has 2 divisors, whose sum is σ = 28070048.
Its totient is φ = 28070046.
The previous prime is 28069997. The next prime is 28070069. The reversal of 28070047 is 74007082.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 28070047 - 27 = 28069919 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 28069997 and 28070024.
It is a congruent number.
It is a weakly prime.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14035023 + 14035024.
It is an arithmetic number, because the mean of its divisors is an integer number (14035024).
Almost surely, 228070047 is an apocalyptic number.
28070047 is a deficient number, since it is larger than the sum of its proper divisors (1).
28070047 is an equidigital number, since it uses as much as digits as its factorization.
28070047 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 3136, while the sum is 28.
The square root of 28070047 is about 5298.1173071196.
The cubic root of 28070047 is about 303.9119053084.
The spelling of 28070047 in words is "twenty-eight million, seventy thousand, forty-seven".