28183322281 has 16 divisors (see below), whose sum is σ = 29074651200. Its totient is φ = 27299118528.

The previous prime is 28183322263. The next prime is 28183322339. The reversal of 28183322281 is 18222338182.

It is a cyclic number.

It is not a de Polignac number, because 28183322281 - 2¹¹ = 28183320233 is a prime.

It is a super-2 number, since 2×28183322281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28183322681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8726575 + ... + 8729803.

It is an arithmetic number, because the mean of its divisors is an integer number (1817165700).

Almost surely, 2^28183322281 is an apocalyptic number.

It is an amenable number.

28183322281 is a deficient number, since it is larger than the sum of its proper divisors (891328919).

28183322281 is a wasteful number, since it uses less digits than its factorization.

28183322281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4248.

The product of its digits is 73728, while the sum is 40.

It can be divided in two parts, 28183 and 322281, that added together give a square (350464 = 592²).

The spelling of 28183322281 in words is "twenty-eight billion, one hundred eighty-three million, three hundred twenty-two thousand, two hundred eighty-one".