28196729766680 has 64 divisors (see below), whose sum is σ = 63516407256000. Its totient is φ = 11265585744384.

The previous prime is 28196729766659. The next prime is 28196729766697. The reversal of 28196729766680 is 8666792769182.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119315597 + ... + 119551683.

It is an arithmetic number, because the mean of its divisors is an integer number (992443863375).

Almost surely, 2^{28196729766680} is an apocalyptic number.

28196729766680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28196729766680 is an abundant number, since it is smaller than the sum of its proper divisors (35319677489320).

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

28196729766680 is a wasteful number, since it uses less digits than its factorization.

28196729766680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239556 (or 239552 counting only the distinct ones).

The product of its (nonzero) digits is 1316818944, while the sum is 77.

The spelling of 28196729766680 in words is "twenty-eight trillion, one hundred ninety-six billion, seven hundred twenty-nine million, seven hundred sixty-six thousand, six hundred eighty".