28797797 has 8 divisors (see below), whose sum is σ = 33030336. Its totient is φ = 24594912.

The previous prime is 28797773. The next prime is 28797809. The reversal of 28797797 is 79779782.

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 28797797 - 2¹⁰ = 28796773 is a prime.

It is a super-2 number, since 2×28797797² = 1658626224106418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28797707) 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, 5288 + ... + 9249.

It is an arithmetic number, because the mean of its divisors is an integer number (4128792).

Almost surely, 2^28797797 is an apocalyptic number.

It is an amenable number.

28797797 is a deficient number, since it is larger than the sum of its proper divisors (4232539).

28797797 is a wasteful number, since it uses less digits than its factorization.

28797797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14827.

The product of its digits is 3111696, while the sum is 56.

The square root of 28797797 is about 5366.3578896678. The cubic root of 28797797 is about 306.5159571115.

The spelling of 28797797 in words is "twenty-eight million, seven hundred ninety-seven thousand, seven hundred ninety-seven".