28341643 has 12 divisors (see below), whose sum is σ = 31399704. Its totient is φ = 25368000.

The previous prime is 28341623. The next prime is 28341661. The reversal of 28341643 is 34614382.

It is not a de Polignac number, because 28341643 - 2¹⁷ = 28210571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28341623) 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 in 11 ways as a sum of consecutive naturals, for example, 187618 + ... + 187768.

It is an arithmetic number, because the mean of its divisors is an integer number (2616642).

Almost surely, 2^28341643 is an apocalyptic number.

28341643 is a deficient number, since it is larger than the sum of its proper divisors (3058061).

28341643 is a wasteful number, since it uses less digits than its factorization.

28341643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426 (or 275 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 28341643 is about 5323.6869742689. The cubic root of 28341643 is about 304.8889428148. Note that the first 3 decimals are identical.

The spelling of 28341643 in words is "twenty-eight million, three hundred forty-one thousand, six hundred forty-three".