128471188 has 6 divisors (see below), whose sum is σ = 224824586. Its totient is φ = 64235592.

The previous prime is 128471171. The next prime is 128471191. The reversal of 128471188 is 881174821.

It can be written as a sum of positive squares in only one way, i.e., 125708944 + 2762244 = 11212^2 + 1662^2 .

It is a super-2 number, since 2×128471188² = 33009692292262688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 128471188.

It is a congruent number.

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, 16058895 + ... + 16058902.

Almost surely, 2^128471188 is an apocalyptic number.

It is an amenable number.

128471188 is a deficient number, since it is larger than the sum of its proper divisors (96353398).

128471188 is a wasteful number, since it uses less digits than its factorization.

128471188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32117801 (or 32117799 counting only the distinct ones).

The product of its digits is 28672, while the sum is 40.

The square root of 128471188 is about 11334.5131346697. The cubic root of 128471188 is about 504.5860582021.

The spelling of 128471188 in words is "one hundred twenty-eight million, four hundred seventy-one thousand, one hundred eighty-eight".