128109162 has 16 divisors (see below), whose sum is σ = 261053280. Its totient is φ = 41897232.

The previous prime is 128109151. The next prime is 128109193. The reversal of 128109162 is 261901821.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201112 + ... + 201747.

It is an arithmetic number, because the mean of its divisors is an integer number (16315830).

Almost surely, 2^128109162 is an apocalyptic number.

128109162 is an abundant number, since it is smaller than the sum of its proper divisors (132944118).

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

128109162 is a wasteful number, since it uses less digits than its factorization.

128109162 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402917.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 128109162 is about 11318.5317952462. The cubic root of 128109162 is about 504.1116453977. Note that the first 3 decimals are identical.

It can be divided in two parts, 128109 and 162, that added together give a triangular number (128271 = T₅₀₆).

The spelling of 128109162 in words is "one hundred twenty-eight million, one hundred nine thousand, one hundred sixty-two".