28854685143 has 24 divisors (see below), whose sum is σ = 41855748480. Its totient is φ = 19155050640.

The previous prime is 28854685133. The next prime is 28854685159. The reversal of 28854685143 is 34158645882.

28854685143 is a `hidden beast` number, since 2 + 8 + 8 + 546 + 8 + 51 + 43 = 666.

It is not a de Polignac number, because 28854685143 - 2⁹ = 28854684631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28854685143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28854685133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2116278 + ... + 2129868.

It is an arithmetic number, because the mean of its divisors is an integer number (1743989520).

Almost surely, 2^28854685143 is an apocalyptic number.

28854685143 is a deficient number, since it is larger than the sum of its proper divisors (13001063337).

28854685143 is a wasteful number, since it uses less digits than its factorization.

28854685143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14579 (or 14576 counting only the distinct ones).

The product of its digits is 7372800, while the sum is 54.

The spelling of 28854685143 in words is "twenty-eight billion, eight hundred fifty-four million, six hundred eighty-five thousand, one hundred forty-three".