128106305 has 16 divisors (see below), whose sum is σ = 163088640. Its totient is φ = 96268032.

The previous prime is 128106289. The next prime is 128106323. The reversal of 128106305 is 503601821.

It is a cyclic number.

It is not a de Polignac number, because 128106305 - 2⁴ = 128106289 is a prime.

It is a super-2 number, since 2×128106305² = 32822450761506050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54872 + ... + 57158.

It is an arithmetic number, because the mean of its divisors is an integer number (10193040).

Almost surely, 2^128106305 is an apocalyptic number.

It is an amenable number.

128106305 is a deficient number, since it is larger than the sum of its proper divisors (34982335).

128106305 is a wasteful number, since it uses less digits than its factorization.

128106305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2968.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 128106305 is about 11318.4055855938. The cubic root of 128106305 is about 504.1078979226.

The spelling of 128106305 in words is "one hundred twenty-eight million, one hundred six thousand, three hundred five".