28703543 has 4 divisors (see below), whose sum is σ = 31312968. Its totient is φ = 26094120.

The previous prime is 28703513. The next prime is 28703569. The reversal of 28703543 is 34530782.

It is a happy number.

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 28703543 - 2¹⁶ = 28638007 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 (28703513) 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, 1304696 + ... + 1304717.

It is an arithmetic number, because the mean of its divisors is an integer number (7828242).

Almost surely, 2^28703543 is an apocalyptic number.

28703543 is a deficient number, since it is larger than the sum of its proper divisors (2609425).

28703543 is a wasteful number, since it uses less digits than its factorization.

28703543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2609424.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28703543 is about 5357.5687583082. The cubic root of 28703543 is about 306.1811869270.

The spelling of 28703543 in words is "twenty-eight million, seven hundred three thousand, five hundred forty-three".