128779126 has 8 divisors (see below), whose sum is σ = 220764240. Its totient is φ = 55191048.

The previous prime is 128779121. The next prime is 128779127. The reversal of 128779126 is 621977821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128779121) 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, 4599241 + ... + 4599268.

It is an arithmetic number, because the mean of its divisors is an integer number (27595530).

Almost surely, 2^128779126 is an apocalyptic number.

128779126 is a deficient number, since it is larger than the sum of its proper divisors (91985114).

128779126 is an equidigital number, since it uses as much as digits as its factorization.

128779126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9198518.

The product of its digits is 84672, while the sum is 43.

The square root of 128779126 is about 11348.0890902389. The cubic root of 128779126 is about 504.9888910408.

The spelling of 128779126 in words is "one hundred twenty-eight million, seven hundred seventy-nine thousand, one hundred twenty-six".