128866162 has 8 divisors (see below), whose sum is σ = 193782492. Its totient is φ = 64272000.

The previous prime is 128866147. The next prime is 128866187. The reversal of 128866162 is 261668821.

It can be written as a sum of positive squares in 2 ways, for example, as 105042001 + 23824161 = 10249^2 + 4881^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×128866162² = 33212975417220488, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79539 + ... + 81142.

Almost surely, 2^128866162 is an apocalyptic number.

128866162 is a deficient number, since it is larger than the sum of its proper divisors (64916330).

128866162 is a wasteful number, since it uses less digits than its factorization.

128866162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161084.

The product of its digits is 55296, while the sum is 40.

The square root of 128866162 is about 11351.9232731727. The cubic root of 128866162 is about 505.1026318217.

The spelling of 128866162 in words is "one hundred twenty-eight million, eight hundred sixty-six thousand, one hundred sixty-two".