128836648 has 16 divisors (see below), whose sum is σ = 245664000. Its totient is φ = 63326256.

The previous prime is 128836619. The next prime is 128836649. The reversal of 128836648 is 846638821.

It is a junction number, because it is equal to n+sod(n) for n = 128836598 and 128836607.

It is not an unprimeable number, because it can be changed into a prime (128836649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 136008 + ... + 136951.

It is an arithmetic number, because the mean of its divisors is an integer number (15354000).

Almost surely, 2^128836648 is an apocalyptic number.

It is an amenable number.

128836648 is a deficient number, since it is larger than the sum of its proper divisors (116827352).

128836648 is a wasteful number, since it uses less digits than its factorization.

128836648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273024 (or 273020 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 128836648 is about 11350.6232428004. The cubic root of 128836648 is about 505.0640679425.

The spelling of 128836648 in words is "one hundred twenty-eight million, eight hundred thirty-six thousand, six hundred forty-eight".