128165706 has 64 divisors (see below), whose sum is σ = 305337600. Its totient is φ = 39745728.

The previous prime is 128165701. The next prime is 128165711. The reversal of 128165706 is 607561821.

128165706 is a `hidden beast` number, since 1 + 2 + 81 + 6 + 570 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (128165701) and next prime (128165711).

It is not an unprimeable number, because it can be changed into a prime (128165701) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44560 + ... + 47348.

It is an arithmetic number, because the mean of its divisors is an integer number (4770900).

Almost surely, 2^128165706 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128165706, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152668800).

128165706 is an abundant number, since it is smaller than the sum of its proper divisors (177171894).

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

128165706 is a wasteful number, since it uses less digits than its factorization.

128165706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 128165706 is about 11321.0293701589. The cubic root of 128165706 is about 504.1858016764.

The spelling of 128165706 in words is "one hundred twenty-eight million, one hundred sixty-five thousand, seven hundred six".