28434643 has 2 divisors, whose sum is σ = 28434644. Its totient is φ = 28434642.

The previous prime is 28434619. The next prime is 28434649. The reversal of 28434643 is 34643482.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28434643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28434599 and 28434608.

It is not a weakly prime, because it can be changed into another prime (28434649) by changing a digit.

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, 14217321 + 14217322.

It is an arithmetic number, because the mean of its divisors is an integer number (14217322).

Almost surely, 2^28434643 is an apocalyptic number.

28434643 is a deficient number, since it is larger than the sum of its proper divisors (1).

28434643 is an equidigital number, since it uses as much as digits as its factorization.

28434643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 34.

The square root of 28434643 is about 5332.4143687452. The cubic root of 28434643 is about 305.2220652787. Note that the first 3 decimals are identical.

The spelling of 28434643 in words is "twenty-eight million, four hundred thirty-four thousand, six hundred forty-three".