28441481861 has 8 divisors (see below), whose sum is σ = 31131408504. Its totient is φ = 25823286720.

The previous prime is 28441481851. The next prime is 28441481891. The reversal of 28441481861 is 16818414482.

It can be written as a sum of positive squares in 4 ways, for example, as 23951236 + 28417530625 = 4894^2 + 168575^2 .

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 28441481861 - 2¹⁸ = 28441219717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28441481801) 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, 17932046 + ... + 17933631.

It is an arithmetic number, because the mean of its divisors is an integer number (3891426063).

Almost surely, 2^28441481861 is an apocalyptic number.

It is an amenable number.

28441481861 is a deficient number, since it is larger than the sum of its proper divisors (2689926643).

28441481861 is a wasteful number, since it uses less digits than its factorization.

28441481861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35865751.

The product of its digits is 393216, while the sum is 47.

The spelling of 28441481861 in words is "twenty-eight billion, four hundred forty-one million, four hundred eighty-one thousand, eight hundred sixty-one".