128522660 has 24 divisors (see below), whose sum is σ = 308454720. Its totient is φ = 44064864.

The previous prime is 128522629. The next prime is 128522671. The reversal of 128522660 is 66225821.

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 7 ways as a sum of consecutive naturals, for example, 458870 + ... + 459149.

It is an arithmetic number, because the mean of its divisors is an integer number (12852280).

Almost surely, 2^128522660 is an apocalyptic number.

128522660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128522660 is an abundant number, since it is smaller than the sum of its proper divisors (179932060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128522660 is a wasteful number, since it uses less digits than its factorization.

128522660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 918035 (or 918033 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 128522660 is about 11336.7834944485. The cubic root of 128522660 is about 504.6534366969.

The spelling of 128522660 in words is "one hundred twenty-eight million, five hundred twenty-two thousand, six hundred sixty".