128871716 has 6 divisors (see below), whose sum is σ = 225525510. Its totient is φ = 64435856.

The previous prime is 128871709. The next prime is 128871719. The reversal of 128871716 is 617178821.

It can be written as a sum of positive squares in only one way, i.e., 128142400 + 729316 = 11320^2 + 854^2 .

It is not an unprimeable number, because it can be changed into a prime (128871719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16108961 + ... + 16108968.

It is an arithmetic number, because the mean of its divisors is an integer number (37587585).

Almost surely, 2^128871716 is an apocalyptic number.

It is an amenable number.

128871716 is a deficient number, since it is larger than the sum of its proper divisors (96653794).

128871716 is a wasteful number, since it uses less digits than its factorization.

128871716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32217933 (or 32217931 counting only the distinct ones).

The product of its digits is 37632, while the sum is 41.

The square root of 128871716 is about 11352.1678986879. The cubic root of 128871716 is about 505.1098881867.

The spelling of 128871716 in words is "one hundred twenty-eight million, eight hundred seventy-one thousand, seven hundred sixteen".