128716885 has 16 divisors (see below), whose sum is σ = 170815680. Its totient is φ = 92327040.

The previous prime is 128716871. The next prime is 128716897. The reversal of 128716885 is 588617821.

It is not a de Polignac number, because 128716885 - 2¹³ = 128708693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12015 + ... + 20044.

It is an arithmetic number, because the mean of its divisors is an integer number (10675980).

Almost surely, 2^128716885 is an apocalyptic number.

It is an amenable number.

128716885 is a deficient number, since it is larger than the sum of its proper divisors (42098795).

128716885 is a wasteful number, since it uses less digits than its factorization.

128716885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32148.

The product of its digits is 215040, while the sum is 46.

The square root of 128716885 is about 11345.3464028208. The cubic root of 128716885 is about 504.9075215425.

The spelling of 128716885 in words is "one hundred twenty-eight million, seven hundred sixteen thousand, eight hundred eighty-five".