28689888721230 has 192 divisors, whose sum is σ = 85063253483520. Its totient is φ = 6645565555200.

The previous prime is 28689888721213. The next prime is 28689888721349. The reversal of 28689888721230 is 3212788898682.

28689888721230 is a `hidden beast` number, since 286 + 8 + 98 + 8 + 8 + 7 + 21 + 230 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3492127 + ... + 8341146.

It is an arithmetic number, because the mean of its divisors is an integer number (443037778560).

Almost surely, 2^{28689888721230} is an apocalyptic number.

28689888721230 is an abundant number, since it is smaller than the sum of its proper divisors (56373364762290).

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

28689888721230 is a wasteful number, since it uses less digits than its factorization.

28689888721230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11833407 (or 11833404 counting only the distinct ones).

The product of its (nonzero) digits is 297271296, while the sum is 72.

The spelling of 28689888721230 in words is "twenty-eight trillion, six hundred eighty-nine billion, eight hundred eighty-eight million, seven hundred twenty-one thousand, two hundred thirty".