128235936 has 24 divisors (see below), whose sum is σ = 336619584. Its totient is φ = 42745280.

The previous prime is 128235931. The next prime is 128235937. The reversal of 128235936 is 639532821.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 128235894 and 128235903.

It is not an unprimeable number, because it can be changed into a prime (128235931) 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 3 ways as a sum of consecutive naturals, for example, 667800 + ... + 667991.

It is an arithmetic number, because the mean of its divisors is an integer number (14025816).

Almost surely, 2^128235936 is an apocalyptic number.

128235936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

128235936 is an abundant number, since it is smaller than the sum of its proper divisors (208383648).

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

128235936 is a wasteful number, since it uses less digits than its factorization.

128235936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335804 (or 1335796 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 128235936 is about 11324.1306951130. The cubic root of 128235936 is about 504.2778764972.

The spelling of 128235936 in words is "one hundred twenty-eight million, two hundred thirty-five thousand, nine hundred thirty-six".