28650668704880 has 80 divisors (see below), whose sum is σ = 69394075682400. Its totient is φ = 10991244472320.

The previous prime is 28650668704829. The next prime is 28650668704951. The reversal of 28650668704880 is 8840786605682.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 28650668704880.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 73831565 + ... + 74218604.

It is an arithmetic number, because the mean of its divisors is an integer number (867425946030).

Almost surely, 2^{28650668704880} is an apocalyptic number.

28650668704880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28650668704880 is an abundant number, since it is smaller than the sum of its proper divisors (40743406977520).

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

28650668704880 is a wasteful number, since it uses less digits than its factorization.

28650668704880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148050282 (or 148050276 counting only the distinct ones).

The product of its (nonzero) digits is 247726080, while the sum is 68.

The spelling of 28650668704880 in words is "twenty-eight trillion, six hundred fifty billion, six hundred sixty-eight million, seven hundred four thousand, eight hundred eighty".