128705822 has 16 divisors (see below), whose sum is σ = 221616000. Its totient is φ = 54915288.

The previous prime is 128705807. The next prime is 128705849. The reversal of 128705822 is 228507821.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17072 + ... + 23427.

It is an arithmetic number, because the mean of its divisors is an integer number (13851000).

Almost surely, 2^128705822 is an apocalyptic number.

128705822 is a deficient number, since it is larger than the sum of its proper divisors (92910178).

128705822 is a wasteful number, since it uses less digits than its factorization.

128705822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40735.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 128705822 is about 11344.8588356136. The cubic root of 128705822 is about 504.8930558103.

The spelling of 128705822 in words is "one hundred twenty-eight million, seven hundred five thousand, eight hundred twenty-two".