128120826 has 16 divisors (see below), whose sum is σ = 257156928. Its totient is φ = 42554400.

The previous prime is 128120813. The next prime is 128120827. The reversal of 128120826 is 628021821.

It is a junction number, because it is equal to n+sod(n) for n = 128120793 and 128120802.

It is not an unprimeable number, because it can be changed into a prime (128120827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36310 + ... + 39681.

It is an arithmetic number, because the mean of its divisors is an integer number (16072308).

Almost surely, 2^128120826 is an apocalyptic number.

128120826 is an abundant number, since it is smaller than the sum of its proper divisors (129036102).

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

128120826 is a wasteful number, since it uses less digits than its factorization.

128120826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76277.

The product of its (nonzero) digits is 3072, while the sum is 30.

The square root of 128120826 is about 11319.0470446942. The cubic root of 128120826 is about 504.1269442769.

The spelling of 128120826 in words is "one hundred twenty-eight million, one hundred twenty thousand, eight hundred twenty-six".