28646543 has 2 divisors, whose sum is σ = 28646544. Its totient is φ = 28646542.

The previous prime is 28646539. The next prime is 28646561. The reversal of 28646543 is 34564682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28646543 - 2² = 28646539 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28646497 and 28646506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28646593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14323271 + 14323272.

It is an arithmetic number, because the mean of its divisors is an integer number (14323272).

Almost surely, 2^28646543 is an apocalyptic number.

28646543 is a deficient number, since it is larger than the sum of its proper divisors (1).

28646543 is an equidigital number, since it uses as much as digits as its factorization.

28646543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 38.

The square root of 28646543 is about 5352.2465376700. The cubic root of 28646543 is about 305.9783792946.

The spelling of 28646543 in words is "twenty-eight million, six hundred forty-six thousand, five hundred forty-three".