28336938543 has 6 divisors (see below), whose sum is σ = 40931133464. Its totient is φ = 18891292356.

The previous prime is 28336938541. The next prime is 28336938569. The reversal of 28336938543 is 34583963382.

It is a happy number.

28336938543 is a `hidden beast` number, since 2 + 8 + 3 + 3 + 6 + 93 + 8 + 543 = 666.

It is not a de Polignac number, because 28336938543 - 2¹ = 28336938541 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28336938543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28336938541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1574274355 + ... + 1574274372.

Almost surely, 2^28336938543 is an apocalyptic number.

28336938543 is a deficient number, since it is larger than the sum of its proper divisors (12594194921).

28336938543 is a wasteful number, since it uses less digits than its factorization.

28336938543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3148548733 (or 3148548730 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 54.

The spelling of 28336938543 in words is "twenty-eight billion, three hundred thirty-six million, nine hundred thirty-eight thousand, five hundred forty-three".