128605770 has 24 divisors (see below), whose sum is σ = 334375236. Its totient is φ = 34294848.

The previous prime is 128605739. The next prime is 128605777. The reversal of 128605770 is 77506821.

128605770 is a `hidden beast` number, since 1 + 2 + 86 + 0 + 577 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 119443041 + 9162729 = 10929^2 + 3027^2 .

It is not an unprimeable number, because it can be changed into a prime (128605777) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 714387 + ... + 714566.

Almost surely, 2^128605770 is an apocalyptic number.

128605770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128605770 is an abundant number, since it is smaller than the sum of its proper divisors (205769466).

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

128605770 is a wasteful number, since it uses less digits than its factorization.

128605770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1428966 (or 1428963 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 128605770 is about 11340.4484038331. The cubic root of 128605770 is about 504.7621923817.

The spelling of 128605770 in words is "one hundred twenty-eight million, six hundred five thousand, seven hundred seventy".