128066172 has 36 divisors (see below), whose sum is σ = 323580600. Its totient is φ = 39404352.

The previous prime is 128066153. The next prime is 128066201. The reversal of 128066172 is 271660821.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 29547 + ... + 33602.

It is an arithmetic number, because the mean of its divisors is an integer number (8988350).

Almost surely, 2^128066172 is an apocalyptic number.

128066172 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128066172 is an abundant number, since it is smaller than the sum of its proper divisors (195514428).

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

128066172 is a wasteful number, since it uses less digits than its factorization.

128066172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63182 (or 63167 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 128066172 is about 11316.6325379947. The cubic root of 128066172 is about 504.0552503048.

The spelling of 128066172 in words is "one hundred twenty-eight million, sixty-six thousand, one hundred seventy-two".