128660884 has 12 divisors (see below), whose sum is σ = 245625408. Its totient is φ = 58482200.

The previous prime is 128660869. The next prime is 128660891. The reversal of 128660884 is 488066821.

It is a super-3 number, since 3×128660884³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 128660884.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1462012 + ... + 1462099.

It is an arithmetic number, because the mean of its divisors is an integer number (20468784).

Almost surely, 2^128660884 is an apocalyptic number.

It is an amenable number.

128660884 is a deficient number, since it is larger than the sum of its proper divisors (116964524).

128660884 is a wasteful number, since it uses less digits than its factorization.

128660884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2924126 (or 2924124 counting only the distinct ones).

The product of its (nonzero) digits is 147456, while the sum is 43.

The square root of 128660884 is about 11342.8781180087. The cubic root of 128660884 is about 504.8342873596.

The spelling of 128660884 in words is "one hundred twenty-eight million, six hundred sixty thousand, eight hundred eighty-four".