28875797 has 4 divisors (see below), whose sum is σ = 28899456. Its totient is φ = 28852140.

The previous prime is 28875779. The next prime is 28875827. The reversal of 28875797 is 79757882.

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 28875797 - 2⁶ = 28875733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28875697) 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, 9893 + ... + 12474.

It is an arithmetic number, because the mean of its divisors is an integer number (7224864).

Almost surely, 2^28875797 is an apocalyptic number.

It is an amenable number.

28875797 is a deficient number, since it is larger than the sum of its proper divisors (23659).

28875797 is a wasteful number, since it uses less digits than its factorization.

28875797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23658.

The product of its digits is 1975680, while the sum is 53.

The square root of 28875797 is about 5373.6204741310. The cubic root of 28875797 is about 306.7924445987.

The spelling of 28875797 in words is "twenty-eight million, eight hundred seventy-five thousand, seven hundred ninety-seven".