28138811105430 has 32 divisors (see below), whose sum is σ = 75036829615200. Its totient is φ = 7503682961376.

The previous prime is 28138811105399. The next prime is 28138811105473. The reversal of 28138811105430 is 3450111883182.

28138811105430 is a `hidden beast` number, since 2 + 8 + 1 + 3 + 88 + 11 + 10 + 543 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52108909185 + ... + 52108909724.

It is an arithmetic number, because the mean of its divisors is an integer number (2344900925475).

Almost surely, 2^{28138811105430} is an apocalyptic number.

28138811105430 is an abundant number, since it is smaller than the sum of its proper divisors (46898018509770).

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

28138811105430 is a wasteful number, since it uses less digits than its factorization.

28138811105430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104217818925 (or 104217818919 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 45.

The spelling of 28138811105430 in words is "twenty-eight trillion, one hundred thirty-eight billion, eight hundred eleven million, one hundred five thousand, four hundred thirty".