128340512 has 12 divisors (see below), whose sum is σ = 252670446. Its totient is φ = 64170240.

The previous prime is 128340479. The next prime is 128340521. The reversal of 128340512 is 215043821.

It can be written as a sum of positive squares in only one way, i.e., 121969936 + 6370576 = 11044^2 + 2524^2 .

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

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, 2005289 + ... + 2005352.

Almost surely, 2^128340512 is an apocalyptic number.

It is an amenable number.

128340512 is a deficient number, since it is larger than the sum of its proper divisors (124329934).

128340512 is an equidigital number, since it uses as much as digits as its factorization.

128340512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4010651 (or 4010643 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128340512 is about 11328.7471505017. The cubic root of 128340512 is about 504.4149182557.

The spelling of 128340512 in words is "one hundred twenty-eight million, three hundred forty thousand, five hundred twelve".