128711670 has 32 divisors (see below), whose sum is σ = 309270528. Its totient is φ = 34282848.

The previous prime is 128711663. The next prime is 128711699. The reversal of 128711670 is 76117821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30637 + ... + 34583.

It is an arithmetic number, because the mean of its divisors is an integer number (9664704).

Almost surely, 2^128711670 is an apocalyptic number.

128711670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128711670 is an abundant number, since it is smaller than the sum of its proper divisors (180558858).

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

128711670 is a wasteful number, since it uses less digits than its factorization.

128711670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5044.

The product of its (nonzero) digits is 4704, while the sum is 33.

The square root of 128711670 is about 11345.1165705778. The cubic root of 128711670 is about 504.9007026280.

It can be divided in two parts, 12871 and 1670, that added together give a palindrome (14541).

The spelling of 128711670 in words is "one hundred twenty-eight million, seven hundred eleven thousand, six hundred seventy".