28366218685 has 8 divisors (see below), whose sum is σ = 38902242816. Its totient is φ = 19451121360.

The previous prime is 28366218679. The next prime is 28366218689. The reversal of 28366218685 is 58681266382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28366218685 - 2³ = 28366218677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28366218689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 405231661 + ... + 405231730.

It is an arithmetic number, because the mean of its divisors is an integer number (4862780352).

Almost surely, 2^28366218685 is an apocalyptic number.

It is an amenable number.

28366218685 is a deficient number, since it is larger than the sum of its proper divisors (10536024131).

28366218685 is an equidigital number, since it uses as much as digits as its factorization.

28366218685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810463403.

The product of its digits is 6635520, while the sum is 55.

The spelling of 28366218685 in words is "twenty-eight billion, three hundred sixty-six million, two hundred eighteen thousand, six hundred eighty-five".