28646047 has 2 divisors, whose sum is σ = 28646048. Its totient is φ = 28646046.

The previous prime is 28646021. The next prime is 28646069. The reversal of 28646047 is 74064682.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28646047 - 2⁷ = 28645919 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 28645997 and 28646015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28646087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323023 + 14323024.

It is an arithmetic number, because the mean of its divisors is an integer number (14323024).

Almost surely, 2^28646047 is an apocalyptic number.

28646047 is a deficient number, since it is larger than the sum of its proper divisors (1).

28646047 is an equidigital number, since it uses as much as digits as its factorization.

28646047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64512, while the sum is 37.

The square root of 28646047 is about 5352.2002017862. The cubic root of 28646047 is about 305.9766133322.

It can be divided in two parts, 2864 and 6047, that added together give a triangular number (8911 = T₁₃₃).

The spelling of 28646047 in words is "twenty-eight million, six hundred forty-six thousand, forty-seven".