128340112 has 10 divisors (see below), whose sum is σ = 248658998. Its totient is φ = 64170048.

The previous prime is 128340103. The next prime is 128340131. The reversal of 128340112 is 211043821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 123743376 + 4596736 = 11124^2 + 2144^2 .

It is a super-3 number, since 3×128340112³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4010613 + ... + 4010644.

Almost surely, 2^128340112 is an apocalyptic number.

It is an amenable number.

128340112 is a deficient number, since it is larger than the sum of its proper divisors (120318886).

128340112 is an equidigital number, since it uses as much as digits as its factorization.

128340112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8021265 (or 8021259 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 128340112 is about 11328.7294962851. The cubic root of 128340112 is about 504.4143942171.

Adding to 128340112 its reverse (211043821), we get a palindrome (339383933).

The spelling of 128340112 in words is "one hundred twenty-eight million, three hundred forty thousand, one hundred twelve".