28973259857 has 4 divisors (see below), whose sum is σ = 28982175216. Its totient is φ = 28964344500.

The previous prime is 28973259841. The next prime is 28973259899. The reversal of 28973259857 is 75895237982.

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 28973259857 - 2⁴ = 28973259841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28973259793 and 28973259802.

It is not an unprimeable number, because it can be changed into a prime (28973256857) 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, 4452803 + ... + 4459304.

It is an arithmetic number, because the mean of its divisors is an integer number (7245543804).

Almost surely, 2^28973259857 is an apocalyptic number.

It is an amenable number.

28973259857 is a deficient number, since it is larger than the sum of its proper divisors (8915359).

28973259857 is an equidigital number, since it uses as much as digits as its factorization.

28973259857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8915358.

The product of its digits is 76204800, while the sum is 65.

The spelling of 28973259857 in words is "twenty-eight billion, nine hundred seventy-three million, two hundred fifty-nine thousand, eight hundred fifty-seven".