28895779754889 has 4 divisors (see below), whose sum is σ = 38527706339856. Its totient is φ = 19263853169924.

The previous prime is 28895779754873. The next prime is 28895779754939. The reversal of 28895779754889 is 98845797759882.

It is a happy number.

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 28895779754889 - 2⁴ = 28895779754873 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28895779754796 and 28895779754805.

It is not an unprimeable number, because it can be changed into a prime (28895775754889) 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, 4815963292479 + ... + 4815963292484.

It is an arithmetic number, because the mean of its divisors is an integer number (9631926584964).

Almost surely, 2^{28895779754889} is an apocalyptic number.

It is an amenable number.

28895779754889 is a deficient number, since it is larger than the sum of its proper divisors (9631926584967).

28895779754889 is an equidigital number, since it uses as much as digits as its factorization.

28895779754889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9631926584966.

The product of its digits is 204838502400, while the sum is 96.

The spelling of 28895779754889 in words is "twenty-eight trillion, eight hundred ninety-five billion, seven hundred seventy-nine million, seven hundred fifty-four thousand, eight hundred eighty-nine".