128987512 has 16 divisors (see below), whose sum is σ = 243477000. Its totient is φ = 64060320.

The previous prime is 128987477. The next prime is 128987567. The reversal of 128987512 is 215789821.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52914 + ... + 55297.

Almost surely, 2^128987512 is an apocalyptic number.

It is an amenable number.

128987512 is a deficient number, since it is larger than the sum of its proper divisors (114489488).

128987512 is a wasteful number, since it uses less digits than its factorization.

128987512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108366 (or 108362 counting only the distinct ones).

The product of its digits is 80640, while the sum is 43.

The square root of 128987512 is about 11357.2669247491. The cubic root of 128987512 is about 505.2611295316.

The spelling of 128987512 in words is "one hundred twenty-eight million, nine hundred eighty-seven thousand, five hundred twelve".