128044811 has 4 divisors (see below), whose sum is σ = 128241552. Its totient is φ = 127848072.

The previous prime is 128044769. The next prime is 128044823. The reversal of 128044811 is 118440821.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128044811 - 2⁶ = 128044747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128046811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97391 + ... + 98696.

It is an arithmetic number, because the mean of its divisors is an integer number (32060388).

Almost surely, 2^128044811 is an apocalyptic number.

128044811 is a deficient number, since it is larger than the sum of its proper divisors (196741).

128044811 is an equidigital number, since it uses as much as digits as its factorization.

128044811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196740.

The product of its (nonzero) digits is 2048, while the sum is 29.

The square root of 128044811 is about 11315.6887108121. The cubic root of 128044811 is about 504.0272238486.

The spelling of 128044811 in words is "one hundred twenty-eight million, forty-four thousand, eight hundred eleven".