28346218686 has 24 divisors (see below), whose sum is σ = 61419902544. Its totient is φ = 9448263360.

The previous prime is 28346218669. The next prime is 28346218741. The reversal of 28346218686 is 68681264382.

28346218686 is a `hidden beast` number, since 2 + 8 + 3 + 4 + 621 + 8 + 6 + 8 + 6 = 666.

It is a super-2 number, since 2×28346218686² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 691270 + ... + 731126.

It is an arithmetic number, because the mean of its divisors is an integer number (2559162606).

Almost surely, 2^28346218686 is an apocalyptic number.

28346218686 is an abundant number, since it is smaller than the sum of its proper divisors (33073683858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28346218686 is a wasteful number, since it uses less digits than its factorization.

28346218686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79376 (or 79373 counting only the distinct ones).

The product of its digits is 5308416, while the sum is 54.

The spelling of 28346218686 in words is "twenty-eight billion, three hundred forty-six million, two hundred eighteen thousand, six hundred eighty-six".