28213343 has 2 divisors, whose sum is σ = 28213344. Its totient is φ = 28213342.

The previous prime is 28213337. The next prime is 28213373. The reversal of 28213343 is 34331282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28213343 - 2⁴ = 28213327 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28213313) 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, 14106671 + 14106672.

It is an arithmetic number, because the mean of its divisors is an integer number (14106672).

Almost surely, 2^28213343 is an apocalyptic number.

28213343 is a deficient number, since it is larger than the sum of its proper divisors (1).

28213343 is an equidigital number, since it uses as much as digits as its factorization.

28213343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 26.

The square root of 28213343 is about 5311.6233864987. The cubic root of 28213343 is about 304.4281788077.

The spelling of 28213343 in words is "twenty-eight million, two hundred thirteen thousand, three hundred forty-three".