128626806 has 32 divisors (see below), whose sum is σ = 320732928. Its totient is φ = 33409440.

The previous prime is 128626769. The next prime is 128626829. The reversal of 128626806 is 608626821.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

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, 138745 + ... + 139668.

It is an arithmetic number, because the mean of its divisors is an integer number (10022904).

Almost surely, 2^128626806 is an apocalyptic number.

128626806 is an abundant number, since it is smaller than the sum of its proper divisors (192106122).

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

128626806 is a wasteful number, since it uses less digits than its factorization.

128626806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278436.

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 128626806 is about 11341.3758424629. The cubic root of 128626806 is about 504.7897121387.

The spelling of 128626806 in words is "one hundred twenty-eight million, six hundred twenty-six thousand, eight hundred six".