28344443561 has 8 divisors (see below), whose sum is σ = 34098578880. Its totient is φ = 23016540528.

The previous prime is 28344443551. The next prime is 28344443573. The reversal of 28344443561 is 16534444382.

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 28344443561 - 2¹⁰ = 28344442537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28344443521) 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, 106557926 + ... + 106558191.

It is an arithmetic number, because the mean of its divisors is an integer number (4262322360).

Almost surely, 2^28344443561 is an apocalyptic number.

It is an amenable number.

28344443561 is a deficient number, since it is larger than the sum of its proper divisors (5754135319).

28344443561 is a wasteful number, since it uses less digits than its factorization.

28344443561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213116143.

The product of its digits is 1105920, while the sum is 44.

The spelling of 28344443561 in words is "twenty-eight billion, three hundred forty-four million, four hundred forty-three thousand, five hundred sixty-one".