28446864481 has 16 divisors (see below), whose sum is σ = 33120396288. Its totient is φ = 23929650000.

The previous prime is 28446864449. The next prime is 28446864491. The reversal of 28446864481 is 18446864482.

It is a cyclic number.

It is not a de Polignac number, because 28446864481 - 2⁵ = 28446864449 is a prime.

It is a super-2 number, since 2×28446864481² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28446864421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74395 + ... + 249856.

It is an arithmetic number, because the mean of its divisors is an integer number (2070024768).

Almost surely, 2^28446864481 is an apocalyptic number.

It is an amenable number.

28446864481 is a deficient number, since it is larger than the sum of its proper divisors (4673531807).

28446864481 is a wasteful number, since it uses less digits than its factorization.

28446864481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324492.

The product of its digits is 9437184, while the sum is 55.

Subtracting from 28446864481 its reverse (18446864482), we obtain a palindrome (9999999999).

The spelling of 28446864481 in words is "twenty-eight billion, four hundred forty-six million, eight hundred sixty-four thousand, four hundred eighty-one".