128828611 has 2 divisors, whose sum is σ = 128828612. Its totient is φ = 128828610.

The previous prime is 128828597. The next prime is 128828617. The reversal of 128828611 is 116828821.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 128828611 - 2⁹ = 128828099 is a prime.

It is a super-2 number, since 2×128828611² = 33193622024378642, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7315498 and since 128828611 and 7315498 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (128828617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64414305 + 64414306.

It is an arithmetic number, because the mean of its divisors is an integer number (64414306).

Almost surely, 2^128828611 is an apocalyptic number.

128828611 is a deficient number, since it is larger than the sum of its proper divisors (1).

128828611 is an equidigital number, since it uses as much as digits as its factorization.

128828611 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12288, while the sum is 37.

The square root of 128828611 is about 11350.2692038559. The cubic root of 128828611 is about 505.0535655366.

The spelling of 128828611 in words is "one hundred twenty-eight million, eight hundred twenty-eight thousand, six hundred eleven".