28718760019 has 4 divisors (see below), whose sum is σ = 28726469344. Its totient is φ = 28711050696.

The previous prime is 28718760017. The next prime is 28718760061. The reversal of 28718760019 is 91006781782.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28718760019 - 2¹ = 28718760017 is a prime.

It is a super-2 number, since 2×28718760019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28718760013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3849072 + ... + 3856525.

It is an arithmetic number, because the mean of its divisors is an integer number (7181617336).

Almost surely, 2^28718760019 is an apocalyptic number.

28718760019 is a deficient number, since it is larger than the sum of its proper divisors (7709325).

28718760019 is an equidigital number, since it uses as much as digits as its factorization.

28718760019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7709324.

The product of its (nonzero) digits is 338688, while the sum is 49.

The spelling of 28718760019 in words is "twenty-eight billion, seven hundred eighteen million, seven hundred sixty thousand, nineteen".