28081471385 has 16 divisors (see below), whose sum is σ = 37140187392. Its totient is φ = 20212339200.

The previous prime is 28081471373. The next prime is 28081471391. The reversal of 28081471385 is 58317418082.

It is not a de Polignac number, because 28081471385 - 2⁸ = 28081471129 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 15 ways as a sum of consecutive naturals, for example, 2626481 + ... + 2637150.

It is an arithmetic number, because the mean of its divisors is an integer number (2321261712).

Almost surely, 2^28081471385 is an apocalyptic number.

It is an amenable number.

28081471385 is a deficient number, since it is larger than the sum of its proper divisors (9058716007).

28081471385 is a wasteful number, since it uses less digits than its factorization.

28081471385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5263744.

The product of its (nonzero) digits is 430080, while the sum is 47.

The spelling of 28081471385 in words is "twenty-eight billion, eighty-one million, four hundred seventy-one thousand, three hundred eighty-five".