128845806 has 16 divisors (see below), whose sum is σ = 258612048. Its totient is φ = 42795200.

The previous prime is 128845777. The next prime is 128845817. The reversal of 128845806 is 608548821.

It is a Curzon number.

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, 36525 + ... + 39896.

It is an arithmetic number, because the mean of its divisors is an integer number (16163253).

Almost surely, 2^128845806 is an apocalyptic number.

128845806 is an abundant number, since it is smaller than the sum of its proper divisors (129766242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

128845806 is a wasteful number, since it uses less digits than its factorization.

128845806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76707.

The product of its (nonzero) digits is 122880, while the sum is 42.

The square root of 128845806 is about 11351.0266496031. The cubic root of 128845806 is about 505.0760346906.

The spelling of 128845806 in words is "one hundred twenty-eight million, eight hundred forty-five thousand, eight hundred six".