28636885581180 has 24 divisors (see below), whose sum is σ = 80183279627472. Its totient is φ = 7636502821632.

The previous prime is 28636885581173. The next prime is 28636885581191. The reversal of 28636885581180 is 8118558863682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238640713117 + ... + 238640713236.

It is an arithmetic number, because the mean of its divisors is an integer number (3340969984478).

Almost surely, 2^{28636885581180} is an apocalyptic number.

28636885581180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28636885581180 is an abundant number, since it is smaller than the sum of its proper divisors (51546394046292).

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

28636885581180 is a wasteful number, since it uses less digits than its factorization.

28636885581180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477281426365 (or 477281426363 counting only the distinct ones).

The product of its (nonzero) digits is 176947200, while the sum is 69.

The spelling of 28636885581180 in words is "twenty-eight trillion, six hundred thirty-six billion, eight hundred eighty-five million, five hundred eighty-one thousand, one hundred eighty".