128980616 has 8 divisors (see below), whose sum is σ = 241838670. Its totient is φ = 64490304.

The previous prime is 128980601. The next prime is 128980627. The reversal of 128980616 is 616089821.

It can be written as a sum of positive squares in only one way, i.e., 111724900 + 17255716 = 10570^2 + 4154^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8061281 + ... + 8061296.

Almost surely, 2^128980616 is an apocalyptic number.

It is an amenable number.

128980616 is a deficient number, since it is larger than the sum of its proper divisors (112858054).

128980616 is a wasteful number, since it uses less digits than its factorization.

128980616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16122583 (or 16122579 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 128980616 is about 11356.9633265235. The cubic root of 128980616 is about 505.2521251901.

The spelling of 128980616 in words is "one hundred twenty-eight million, nine hundred eighty thousand, six hundred sixteen".