28318184465 has 8 divisors (see below), whose sum is σ = 33985337640. Its totient is φ = 22652203392.

The previous prime is 28318184437. The next prime is 28318184471. The reversal of 28318184465 is 56448181382.

It can be written as a sum of positive squares in 4 ways, for example, as 7855454161 + 20462730304 = 88631^2 + 143048^2 .

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 28318184465 - 2¹² = 28318180369 is a prime.

It is an unprimeable number.

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, 238964 + ... + 337253.

It is an arithmetic number, because the mean of its divisors is an integer number (4248167205).

Almost surely, 2^28318184465 is an apocalyptic number.

It is an amenable number.

28318184465 is a deficient number, since it is larger than the sum of its proper divisors (5667153175).

28318184465 is an equidigital number, since it uses as much as digits as its factorization.

28318184465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586051.

The product of its digits is 1474560, while the sum is 50.

The spelling of 28318184465 in words is "twenty-eight billion, three hundred eighteen million, one hundred eighty-four thousand, four hundred sixty-five".