28513703 has 4 divisors (see below), whose sum is σ = 28528200. Its totient is φ = 28499208.

The previous prime is 28513691. The next prime is 28513711. The reversal of 28513703 is 30731582.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28513703 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 (28513733) 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, 3728 + ... + 8421.

It is an arithmetic number, because the mean of its divisors is an integer number (7132050).

Almost surely, 2^28513703 is an apocalyptic number.

28513703 is a deficient number, since it is larger than the sum of its proper divisors (14497).

28513703 is a wasteful number, since it uses less digits than its factorization.

28513703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14496.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 28513703 is about 5339.8223753230. The cubic root of 28513703 is about 305.5046844579.

The spelling of 28513703 in words is "twenty-eight million, five hundred thirteen thousand, seven hundred three".