28797 has 8 divisors (see below), whose sum is σ = 39840. Its totient is φ = 18480.

The previous prime is 28793. The next prime is 28807. The reversal of 28797 is 79782.

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

It is not a de Polignac number, because 28797 - 2² = 28793 is a prime.

It is an Ulam number.

28797 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 28797.

It is not an unprimeable number, because it can be changed into a prime (28793) 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, 79 + ... + 252.

It is an arithmetic number, because the mean of its divisors is an integer number (4980).

2²⁸⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

28797 is a deficient number, since it is larger than the sum of its proper divisors (11043).

28797 is a wasteful number, since it uses less digits than its factorization.

28797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363.

The product of its digits is 7056, while the sum is 33.

The square root of 28797 is about 169.6967884198. The cubic root of 28797 is about 30.6513129401.

Adding to 28797 its product of digits (7056), we get a palindrome (35853).

The spelling of 28797 in words is "twenty-eight thousand, seven hundred ninety-seven".