28717703 has 4 divisors (see below), whose sum is σ = 32820240. Its totient is φ = 24615168.

The previous prime is 28717699. The next prime is 28717727. The reversal of 28717703 is 30771782.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30771782 = 2 ⋅15385891.

It is a cyclic number.

It is not a de Polignac number, because 28717703 - 2² = 28717699 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 (28717103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2051258 + ... + 2051271.

It is an arithmetic number, because the mean of its divisors is an integer number (8205060).

Almost surely, 2^28717703 is an apocalyptic number.

28717703 is a deficient number, since it is larger than the sum of its proper divisors (4102537).

28717703 is an equidigital number, since it uses as much as digits as its factorization.

28717703 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4102536.

The product of its (nonzero) digits is 16464, while the sum is 35.

The square root of 28717703 is about 5358.8900903079. The cubic root of 28717703 is about 306.2315269712.

The spelling of 28717703 in words is "twenty-eight million, seven hundred seventeen thousand, seven hundred three".