28693317 has 8 divisors (see below), whose sum is σ = 39191040. Its totient is φ = 18662240.

The previous prime is 28693309. The next prime is 28693319. The reversal of 28693317 is 71339682.

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 28693317 - 2³ = 28693309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28693319) 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, 116517 + ... + 116762.

It is an arithmetic number, because the mean of its divisors is an integer number (4898880).

Almost surely, 2^28693317 is an apocalyptic number.

It is an amenable number.

28693317 is a deficient number, since it is larger than the sum of its proper divisors (10497723).

28693317 is a wasteful number, since it uses less digits than its factorization.

28693317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 233323.

The product of its digits is 54432, while the sum is 39.

The square root of 28693317 is about 5356.6143224989. The cubic root of 28693317 is about 306.1448223023.

It can be divided in two parts, 286 and 93317, that multiplied together give a palindrome (26688662).

The spelling of 28693317 in words is "twenty-eight million, six hundred ninety-three thousand, three hundred seventeen".