128487908 has 6 divisors (see below), whose sum is σ = 224853846. Its totient is φ = 64243952.

The previous prime is 128487889. The next prime is 128487923. The reversal of 128487908 is 809784821.

It can be written as a sum of positive squares in only one way, i.e., 99241444 + 29246464 = 9962^2 + 5408^2 .

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 as a sum of consecutive naturals, namely, 16060985 + ... + 16060992.

It is an arithmetic number, because the mean of its divisors is an integer number (37475641).

Almost surely, 2^128487908 is an apocalyptic number.

It is an amenable number.

128487908 is a deficient number, since it is larger than the sum of its proper divisors (96365938).

128487908 is a wasteful number, since it uses less digits than its factorization.

128487908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32121981 (or 32121979 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 47.

The square root of 128487908 is about 11335.2506809510. The cubic root of 128487908 is about 504.6079471902.

The spelling of 128487908 in words is "one hundred twenty-eight million, four hundred eighty-seven thousand, nine hundred eight".