128736706 has 16 divisors (see below), whose sum is σ = 221097024. Its totient is φ = 55071504.

The previous prime is 128736691. The next prime is 128736737. The reversal of 128736706 is 607637821.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285 + ... + 16048.

It is an arithmetic number, because the mean of its divisors is an integer number (13818564).

Almost surely, 2^128736706 is an apocalyptic number.

128736706 is a deficient number, since it is larger than the sum of its proper divisors (92360318).

128736706 is a wasteful number, since it uses less digits than its factorization.

128736706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16905.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 128736706 is about 11346.2198991558. The cubic root of 128736706 is about 504.9334369675.

The spelling of 128736706 in words is "one hundred twenty-eight million, seven hundred thirty-six thousand, seven hundred six".