128811834 has 12 divisors (see below), whose sum is σ = 279092346. Its totient is φ = 42937272.

The previous prime is 128811833. The next prime is 128811857. The reversal of 128811834 is 438118821.

It can be written as a sum of positive squares in only one way, i.e., 111197025 + 17614809 = 10545^2 + 4197^2 .

It is not an unprimeable number, because it can be changed into a prime (128811833) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3578089 + ... + 3578124.

Almost surely, 2^128811834 is an apocalyptic number.

128811834 is an abundant number, since it is smaller than the sum of its proper divisors (150280512).

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

128811834 is a wasteful number, since it uses less digits than its factorization.

128811834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156221 (or 7156218 counting only the distinct ones).

The product of its digits is 12288, while the sum is 36.

The square root of 128811834 is about 11349.5301224324. The cubic root of 128811834 is about 505.0316406669.

The spelling of 128811834 in words is "one hundred twenty-eight million, eight hundred eleven thousand, eight hundred thirty-four".