28808297 has 4 divisors (see below), whose sum is σ = 32923776. Its totient is φ = 24692820.

The previous prime is 28808293. The next prime is 28808357. The reversal of 28808297 is 79280882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28808297 - 2² = 28808293 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28808293) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2057729 + ... + 2057742.

It is an arithmetic number, because the mean of its divisors is an integer number (8230944).

Almost surely, 2^28808297 is an apocalyptic number.

It is an amenable number.

28808297 is a deficient number, since it is larger than the sum of its proper divisors (4115479).

28808297 is an equidigital number, since it uses as much as digits as its factorization.

28808297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4115478.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 28808297 is about 5367.3361176658. The cubic root of 28808297 is about 306.5532056375.

The spelling of 28808297 in words is "twenty-eight million, eight hundred eight thousand, two hundred ninety-seven".