128234636 has 24 divisors (see below), whose sum is σ = 233718240. Its totient is φ = 61488000.

The previous prime is 128234633. The next prime is 128234641. The reversal of 128234636 is 636432821.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 128234596 and 128234605.

It is not an unprimeable number, because it can be changed into a prime (128234633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13856 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (9738260).

Almost surely, 2^128234636 is an apocalyptic number.

It is an amenable number.

128234636 is a deficient number, since it is larger than the sum of its proper divisors (105483604).

128234636 is a wasteful number, since it uses less digits than its factorization.

128234636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7505 (or 7503 counting only the distinct ones).

The product of its digits is 41472, while the sum is 35.

The square root of 128234636 is about 11324.0732954180. The cubic root of 128234636 is about 504.2761724417.

The spelling of 128234636 in words is "one hundred twenty-eight million, two hundred thirty-four thousand, six hundred thirty-six".