28078765760 has 56 divisors (see below), whose sum is σ = 66883489296. Its totient is φ = 11227991040.

The previous prime is 28078765721. The next prime is 28078765783. The reversal of 28078765760 is 6756787082.

It is a happy number.

It is a super-3 number, since 3×28078765760³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28078765696 and 28078765705.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1169234 + ... + 1193006.

Almost surely, 2^28078765760 is an apocalyptic number.

28078765760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28078765760 is an abundant number, since it is smaller than the sum of its proper divisors (38804723536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28078765760 is a wasteful number, since it uses less digits than its factorization.

28078765760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27481 (or 27471 counting only the distinct ones).

The product of its (nonzero) digits is 7902720, while the sum is 56.

The spelling of 28078765760 in words is "twenty-eight billion, seventy-eight million, seven hundred sixty-five thousand, seven hundred sixty".