28287323306818 has 8 divisors (see below), whose sum is σ = 42448716260748. Its totient is φ = 14137751219904.

The previous prime is 28287323306783. The next prime is 28287323306911. The reversal of 28287323306818 is 81860332378282.

It can be written as a sum of positive squares in 2 ways, for example, as 23449932155169 + 4837391151649 = 4842513^2 + 2199407^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2955210771 + ... + 2955220342.

Almost surely, 2^{28287323306818} is an apocalyptic number.

28287323306818 is a deficient number, since it is larger than the sum of its proper divisors (14161392953930).

28287323306818 is a wasteful number, since it uses less digits than its factorization.

28287323306818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5910433508.

The product of its (nonzero) digits is 37158912, while the sum is 61.

The spelling of 28287323306818 in words is "twenty-eight trillion, two hundred eighty-seven billion, three hundred twenty-three million, three hundred six thousand, eight hundred eighteen".