28315838181 has 8 divisors (see below), whose sum is σ = 37765411200. Its totient is φ = 18871745312.

The previous prime is 28315838179. The next prime is 28315838189. The reversal of 28315838181 is 18183851382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28315838181 - 2¹ = 28315838179 is a prime.

It is a super-2 number, since 2×28315838181² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28315838181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28315838189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1357965 + ... + 1378658.

It is an arithmetic number, because the mean of its divisors is an integer number (4720676400).

Almost surely, 2^28315838181 is an apocalyptic number.

It is an amenable number.

28315838181 is a deficient number, since it is larger than the sum of its proper divisors (9449573019).

28315838181 is a wasteful number, since it uses less digits than its factorization.

28315838181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2740075.

The product of its digits is 368640, while the sum is 48.

The spelling of 28315838181 in words is "twenty-eight billion, three hundred fifteen million, eight hundred thirty-eight thousand, one hundred eighty-one".