28317371 has 4 divisors (see below), whose sum is σ = 28461312. Its totient is φ = 28173432.

The previous prime is 28317343. The next prime is 28317379. The reversal of 28317371 is 17371382.

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-28317371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28317379) 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, 71675 + ... + 72068.

It is an arithmetic number, because the mean of its divisors is an integer number (7115328).

Almost surely, 2^28317371 is an apocalyptic number.

28317371 is a deficient number, since it is larger than the sum of its proper divisors (143941).

28317371 is a wasteful number, since it uses less digits than its factorization.

28317371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143940.

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

The square root of 28317371 is about 5321.4068628512. The cubic root of 28317371 is about 304.8018815486.

The spelling of 28317371 in words is "twenty-eight million, three hundred seventeen thousand, three hundred seventy-one".