128648946 has 16 divisors (see below), whose sum is σ = 265598208. Its totient is φ = 41499600.

The previous prime is 128648909. The next prime is 128648953. The reversal of 128648946 is 649846821.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 128648895 and 128648904.

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, 345645 + ... + 346016.

It is an arithmetic number, because the mean of its divisors is an integer number (16599888).

Almost surely, 2^128648946 is an apocalyptic number.

128648946 is an abundant number, since it is smaller than the sum of its proper divisors (136949262).

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

128648946 is a wasteful number, since it uses less digits than its factorization.

128648946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691697.

The product of its digits is 663552, while the sum is 48.

The square root of 128648946 is about 11342.3518725174. The cubic root of 128648946 is about 504.8186729321.

The spelling of 128648946 in words is "one hundred twenty-eight million, six hundred forty-eight thousand, nine hundred forty-six".