28350543843 has 12 divisors (see below), whose sum is σ = 42731254800. Its totient is φ = 18078607536.

The previous prime is 28350543841. The next prime is 28350543847. The reversal of 28350543843 is 34834505382.

28350543843 is a `hidden beast` number, since 28 + 3 + 5 + 0 + 543 + 84 + 3 = 666.

It is not a de Polignac number, because 28350543843 - 2¹ = 28350543841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28350543841) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 68479368 + ... + 68479781.

It is an arithmetic number, because the mean of its divisors is an integer number (3560937900).

Almost surely, 2^28350543843 is an apocalyptic number.

28350543843 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28350543843 is a deficient number, since it is larger than the sum of its proper divisors (14380710957).

28350543843 is a wasteful number, since it uses less digits than its factorization.

28350543843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136959178 (or 136959175 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 45.

The spelling of 28350543843 in words is "twenty-eight billion, three hundred fifty million, five hundred forty-three thousand, eight hundred forty-three".