28957543 has 4 divisors (see below), whose sum is σ = 28968408. Its totient is φ = 28946680.

The previous prime is 28957541. The next prime is 28957559. The reversal of 28957543 is 34575982.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28957543 - 2¹ = 28957541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28957543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28957541) 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, 1605 + ... + 7777.

It is an arithmetic number, because the mean of its divisors is an integer number (7242102).

Almost surely, 2^28957543 is an apocalyptic number.

28957543 is a deficient number, since it is larger than the sum of its proper divisors (10865).

28957543 is an equidigital number, since it uses as much as digits as its factorization.

28957543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10864.

The product of its digits is 302400, while the sum is 43.

The square root of 28957543 is about 5381.2213297726. The cubic root of 28957543 is about 307.0816767477.

The spelling of 28957543 in words is "twenty-eight million, nine hundred fifty-seven thousand, five hundred forty-three".