28512943 has 2 divisors, whose sum is σ = 28512944. Its totient is φ = 28512942.

The previous prime is 28512923. The next prime is 28512947. The reversal of 28512943 is 34921582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28512943 - 2⁹ = 28512431 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28512899 and 28512908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28512947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14256471 + 14256472.

It is an arithmetic number, because the mean of its divisors is an integer number (14256472).

Almost surely, 2^28512943 is an apocalyptic number.

28512943 is a deficient number, since it is larger than the sum of its proper divisors (1).

28512943 is an equidigital number, since it uses as much as digits as its factorization.

28512943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 34.

The square root of 28512943 is about 5339.7512114330. The cubic root of 28512943 is about 305.5019701417.

The spelling of 28512943 in words is "twenty-eight million, five hundred twelve thousand, nine hundred forty-three".