28584721481 has 8 divisors (see below), whose sum is σ = 29243856384. Its totient is φ = 27932712640.

The previous prime is 28584721453. The next prime is 28584721507. The reversal of 28584721481 is 18412748582.

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 28584721481 - 2¹⁰ = 28584720457 is a prime.

It is a super-2 number, since 2×28584721481² (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 (28584721181) 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 7 ways as a sum of consecutive naturals, for example, 1773401 + ... + 1789446.

It is an arithmetic number, because the mean of its divisors is an integer number (3655482048).

Almost surely, 2^28584721481 is an apocalyptic number.

It is an amenable number.

28584721481 is a deficient number, since it is larger than the sum of its proper divisors (659134903).

28584721481 is a wasteful number, since it uses less digits than its factorization.

28584721481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3563031.

The product of its digits is 1146880, while the sum is 50.

The spelling of 28584721481 in words is "twenty-eight billion, five hundred eighty-four million, seven hundred twenty-one thousand, four hundred eighty-one".