28088887163905 has 8 divisors (see below), whose sum is σ = 33747324028200. Its totient is φ = 22444003443456.

The previous prime is 28088887163891. The next prime is 28088887163963. The reversal of 28088887163905 is 50936178888082.

It can be written as a sum of positive squares in 4 ways, for example, as 10351514760129 + 17737372403776 = 3217377^2 + 4211576^2 .

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 28088887163905 - 2¹³ = 28088887155713 is a prime.

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 7 ways as a sum of consecutive naturals, for example, 3388281400 + ... + 3388289689.

It is an arithmetic number, because the mean of its divisors is an integer number (4218415503525).

Almost surely, 2^{28088887163905} is an apocalyptic number.

It is an amenable number.

28088887163905 is a deficient number, since it is larger than the sum of its proper divisors (5658436864295).

28088887163905 is an equidigital number, since it uses as much as digits as its factorization.

28088887163905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6776571923.

The product of its (nonzero) digits is 371589120, while the sum is 73.

The spelling of 28088887163905 in words is "twenty-eight trillion, eighty-eight billion, eight hundred eighty-seven million, one hundred sixty-three thousand, nine hundred five".