28168667083880 has 64 divisors (see below), whose sum is σ = 66676272336000. Its totient is φ = 10694544765184.

The previous prime is 28168667083847. The next prime is 28168667083889. The reversal of 28168667083880 is 8838076686182.

It is not an unprimeable number, because it can be changed into a prime (28168667083889) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205722524 + ... + 205859403.

It is an arithmetic number, because the mean of its divisors is an integer number (1041816755250).

Almost surely, 2^{28168667083880} is an apocalyptic number.

28168667083880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28168667083880 is an abundant number, since it is smaller than the sum of its proper divisors (38507605252120).

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

28168667083880 is a wasteful number, since it uses less digits than its factorization.

28168667083880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411582026 (or 411582022 counting only the distinct ones).

The product of its (nonzero) digits is 297271296, while the sum is 71.

The spelling of 28168667083880 in words is "twenty-eight trillion, one hundred sixty-eight billion, six hundred sixty-seven million, eighty-three thousand, eight hundred eighty".