28137317 has 12 divisors (see below), whose sum is σ = 30621024. Its totient is φ = 25842960.

The previous prime is 28137311. The next prime is 28137341. The reversal of 28137317 is 71373182.

It is not a de Polignac number, because 28137317 - 2⁴ = 28137301 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 (28137311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55688 + ... + 56190.

It is an arithmetic number, because the mean of its divisors is an integer number (2551752).

Almost surely, 2^28137317 is an apocalyptic number.

It is an amenable number.

28137317 is a deficient number, since it is larger than the sum of its proper divisors (2483707).

28137317 is a wasteful number, since it uses less digits than its factorization.

28137317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860 (or 847 counting only the distinct ones).

The product of its digits is 7056, while the sum is 32.

The square root of 28137317 is about 5304.4619896838. The cubic root of 28137317 is about 304.1544870668.

The spelling of 28137317 in words is "twenty-eight million, one hundred thirty-seven thousand, three hundred seventeen".