128811346 has 12 divisors (see below), whose sum is σ = 205252218. Its totient is φ = 60616832.

The previous prime is 128811341. The next prime is 128811409. The reversal of 128811346 is 643118821.

It can be written as a sum of positive squares in 3 ways, for example, as 127577025 + 1234321 = 11295^2 + 1111^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (128811341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 110851 + ... + 112006.

Almost surely, 2^128811346 is an apocalyptic number.

128811346 is a deficient number, since it is larger than the sum of its proper divisors (76440872).

128811346 is a wasteful number, since it uses less digits than its factorization.

128811346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222893 (or 222876 counting only the distinct ones).

The product of its digits is 9216, while the sum is 34.

The square root of 128811346 is about 11349.5086237246. The cubic root of 128811346 is about 505.0310029001.

The spelling of 128811346 in words is "one hundred twenty-eight million, eight hundred eleven thousand, three hundred forty-six".