128256236 has 6 divisors (see below), whose sum is σ = 224448420. Its totient is φ = 64128116.

The previous prime is 128256203. The next prime is 128256281. The reversal of 128256236 is 632652821.

It is a junction number, because it is equal to n+sod(n) for n = 128256196 and 128256205.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 16032026 + ... + 16032033.

It is an arithmetic number, because the mean of its divisors is an integer number (37408070).

Almost surely, 2^128256236 is an apocalyptic number.

It is an amenable number.

128256236 is a deficient number, since it is larger than the sum of its proper divisors (96192184).

128256236 is a wasteful number, since it uses less digits than its factorization.

128256236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32064063 (or 32064061 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 128256236 is about 11325.0269756853. The cubic root of 128256236 is about 504.3044844853.

The spelling of 128256236 in words is "one hundred twenty-eight million, two hundred fifty-six thousand, two hundred thirty-six".