28330857249 has 4 divisors (see below), whose sum is σ = 37774476336. Its totient is φ = 18887238164.

The previous prime is 28330857241. The next prime is 28330857253. The reversal of 28330857249 is 94275803382.

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 28330857249 - 2³ = 28330857241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28330857241) 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, 4721809539 + ... + 4721809544.

It is an arithmetic number, because the mean of its divisors is an integer number (9443619084).

Almost surely, 2^28330857249 is an apocalyptic number.

It is an amenable number.

28330857249 is a deficient number, since it is larger than the sum of its proper divisors (9443619087).

28330857249 is an equidigital number, since it uses as much as digits as its factorization.

28330857249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9443619086.

The product of its (nonzero) digits is 2903040, while the sum is 51.

The spelling of 28330857249 in words is "twenty-eight billion, three hundred thirty million, eight hundred fifty-seven thousand, two hundred forty-nine".