28868119778 has 4 divisors (see below), whose sum is σ = 43302179670. Its totient is φ = 14434059888.

The previous prime is 28868119769. The next prime is 28868119793. The reversal of 28868119778 is 87791186882.

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

It can be written as a sum of positive squares in only one way, i.e., 27940125409 + 927994369 = 167153^2 + 30463^2 .

It is a super-3 number, since 3×28868119778³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 7217029943 + ... + 7217029946.

Almost surely, 2^28868119778 is an apocalyptic number.

28868119778 is a deficient number, since it is larger than the sum of its proper divisors (14434059892).

28868119778 is a wasteful number, since it uses less digits than its factorization.

28868119778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14434059891.

The product of its digits is 21676032, while the sum is 65.

The spelling of 28868119778 in words is "twenty-eight billion, eight hundred sixty-eight million, one hundred nineteen thousand, seven hundred seventy-eight".