28156681027 has 8 divisors (see below), whose sum is σ = 28317298464. Its totient is φ = 27996215808.

The previous prime is 28156681013. The next prime is 28156681051. The reversal of 28156681027 is 72018665182.

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 28156681027 - 2¹⁹ = 28156156739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28156601027) by changing a digit.

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, 343818 + ... + 417760.

It is an arithmetic number, because the mean of its divisors is an integer number (3539662308).

Almost surely, 2^28156681027 is an apocalyptic number.

28156681027 is a deficient number, since it is larger than the sum of its proper divisors (160617437).

28156681027 is a wasteful number, since it uses less digits than its factorization.

28156681027 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76109.

The product of its (nonzero) digits is 322560, while the sum is 46.

The spelling of 28156681027 in words is "twenty-eight billion, one hundred fifty-six million, six hundred eighty-one thousand, twenty-seven".