128805170 has 16 divisors (see below), whose sum is σ = 249684120. Its totient is φ = 47558784.

The previous prime is 128805163. The next prime is 128805179. The reversal of 128805170 is 71508821.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 117961321 + 10843849 = 10861^2 + 3293^2 .

It is not an unprimeable number, because it can be changed into a prime (128805179) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 495275 + ... + 495534.

Almost surely, 2^128805170 is an apocalyptic number.

128805170 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128805170 is a deficient number, since it is larger than the sum of its proper divisors (120878950).

128805170 is a wasteful number, since it uses less digits than its factorization.

128805170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 990829.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 128805170 is about 11349.2365381994. The cubic root of 128805170 is about 505.0229313510.

The spelling of 128805170 in words is "one hundred twenty-eight million, eight hundred five thousand, one hundred seventy".