28913543 has 4 divisors (see below), whose sum is σ = 29320848. Its totient is φ = 28506240.

The previous prime is 28913527. The next prime is 28913561. The reversal of 28913543 is 34531982.

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 28913543 - 2⁴ = 28913527 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 (28913743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203546 + ... + 203687.

It is an arithmetic number, because the mean of its divisors is an integer number (7330212).

Almost surely, 2^28913543 is an apocalyptic number.

28913543 is a deficient number, since it is larger than the sum of its proper divisors (407305).

28913543 is an equidigital number, since it uses as much as digits as its factorization.

28913543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407304.

The product of its digits is 25920, while the sum is 35.

The square root of 28913543 is about 5377.1314843511. The cubic root of 28913543 is about 306.9260645234.

The spelling of 28913543 in words is "twenty-eight million, nine hundred thirteen thousand, five hundred forty-three".