28517279 has 8 divisors (see below), whose sum is σ = 34508448. Its totient is φ = 23005440.

The previous prime is 28517273. The next prime is 28517287. The reversal of 28517279 is 97271582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28517279 - 2¹⁶ = 28451743 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 (28517273) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119702 + ... + 119939.

It is an arithmetic number, because the mean of its divisors is an integer number (4313556).

Almost surely, 2^28517279 is an apocalyptic number.

28517279 is a deficient number, since it is larger than the sum of its proper divisors (5991169).

28517279 is a wasteful number, since it uses less digits than its factorization.

28517279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239665.

The product of its digits is 70560, while the sum is 41.

The square root of 28517279 is about 5340.1572074238. The cubic root of 28517279 is about 305.5174553829.

The spelling of 28517279 in words is "twenty-eight million, five hundred seventeen thousand, two hundred seventy-nine".