28943383 has 4 divisors (see below), whose sum is σ = 33078160. Its totient is φ = 24808608.

The previous prime is 28943371. The next prime is 28943389. The reversal of 28943383 is 38334982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28943383 - 2²¹ = 26846231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943389) 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 3 ways as a sum of consecutive naturals, for example, 2067378 + ... + 2067391.

It is an arithmetic number, because the mean of its divisors is an integer number (8269540).

Almost surely, 2^28943383 is an apocalyptic number.

28943383 is a deficient number, since it is larger than the sum of its proper divisors (4134777).

28943383 is an equidigital number, since it uses as much as digits as its factorization.

28943383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4134776.

The product of its digits is 124416, while the sum is 40.

The square root of 28943383 is about 5379.9054824411. The cubic root of 28943383 is about 307.0316151167.

The spelling of 28943383 in words is "twenty-eight million, nine hundred forty-three thousand, three hundred eighty-three".