28717459 has 4 divisors (see below), whose sum is σ = 28728304. Its totient is φ = 28706616.

The previous prime is 28717433. The next prime is 28717463. The reversal of 28717459 is 95471782.

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 a de Polignac number, because none of the positive numbers 2^k-28717459 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28717499) 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, 1474 + ... + 7720.

It is an arithmetic number, because the mean of its divisors is an integer number (7182076).

Almost surely, 2^28717459 is an apocalyptic number.

28717459 is a deficient number, since it is larger than the sum of its proper divisors (10845).

28717459 is an equidigital number, since it uses as much as digits as its factorization.

28717459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10844.

The product of its digits is 141120, while the sum is 43.

The square root of 28717459 is about 5358.8673243513. The cubic root of 28717459 is about 306.2306596699.

The spelling of 28717459 in words is "twenty-eight million, seven hundred seventeen thousand, four hundred fifty-nine".