28650943 has 4 divisors (see below), whose sum is σ = 29317288. Its totient is φ = 27984600.

The previous prime is 28650911. The next prime is 28650949. The reversal of 28650943 is 34905682.

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 28650943 - 2⁵ = 28650911 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 (28650949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 333108 + ... + 333193.

It is an arithmetic number, because the mean of its divisors is an integer number (7329322).

Almost surely, 2^28650943 is an apocalyptic number.

28650943 is a deficient number, since it is larger than the sum of its proper divisors (666345).

28650943 is an equidigital number, since it uses as much as digits as its factorization.

28650943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666344.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 28650943 is about 5352.6575642385. The cubic root of 28650943 is about 305.9940441975.

The spelling of 28650943 in words is "twenty-eight million, six hundred fifty thousand, nine hundred forty-three".