28318003561 has 8 divisors (see below), whose sum is σ = 28711313280. Its totient is φ = 27924839712.

The previous prime is 28318003559. The next prime is 28318003577. The reversal of 28318003561 is 16530081382.

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 28318003561 - 2¹ = 28318003559 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28318003561.

It is not an unprimeable number, because it can be changed into a prime (28318003501) 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, 388620 + ... + 455698.

It is an arithmetic number, because the mean of its divisors is an integer number (3588914160).

Almost surely, 2^28318003561 is an apocalyptic number.

It is an amenable number.

28318003561 is a deficient number, since it is larger than the sum of its proper divisors (393309719).

28318003561 is an equidigital number, since it uses as much as digits as its factorization.

28318003561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72935.

The product of its (nonzero) digits is 34560, while the sum is 37.

The spelling of 28318003561 in words is "twenty-eight billion, three hundred eighteen million, three thousand, five hundred sixty-one".