28181618886 has 8 divisors (see below), whose sum is σ = 56363237784. Its totient is φ = 9393872960.

The previous prime is 28181618851. The next prime is 28181618951. The reversal of 28181618886 is 68881618182.

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

28181618886 is an admirable number.

It is a congruent number.

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, 2348468235 + ... + 2348468246.

It is an arithmetic number, because the mean of its divisors is an integer number (7045404723).

Almost surely, 2^28181618886 is an apocalyptic number.

28181618886 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28181618886 is a wasteful number, since it uses less digits than its factorization.

28181618886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4696936486.

The product of its digits is 2359296, while the sum is 57.

The spelling of 28181618886 in words is "twenty-eight billion, one hundred eighty-one million, six hundred eighteen thousand, eight hundred eighty-six".