28504208629128 has 64 divisors (see below), whose sum is σ = 75286244448000. Its totient is φ = 8978581724672.

The previous prime is 28504208629123. The next prime is 28504208629177. The reversal of 28504208629128 is 82192680240582.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28504208629123) 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, 435651573 + ... + 435716996.

It is an arithmetic number, because the mean of its divisors is an integer number (1176347569500).

Almost surely, 2^{28504208629128} is an apocalyptic number.

It is an amenable number.

28504208629128 is an abundant number, since it is smaller than the sum of its proper divisors (46782035818872).

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

28504208629128 is a wasteful number, since it uses less digits than its factorization.

28504208629128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 871368654 (or 871368650 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 57.

The spelling of 28504208629128 in words is "twenty-eight trillion, five hundred four billion, two hundred eight million, six hundred twenty-nine thousand, one hundred twenty-eight".