128236412 has 6 divisors (see below), whose sum is σ = 224413728. Its totient is φ = 64118204.

The previous prime is 128236369. The next prime is 128236417. The reversal of 128236412 is 214632821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128236417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16029548 + ... + 16029555.

It is an arithmetic number, because the mean of its divisors is an integer number (37402288).

Almost surely, 2^128236412 is an apocalyptic number.

It is an amenable number.

128236412 is a deficient number, since it is larger than the sum of its proper divisors (96177316).

128236412 is a wasteful number, since it uses less digits than its factorization.

128236412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32059107 (or 32059105 counting only the distinct ones).

The product of its digits is 4608, while the sum is 29.

The square root of 128236412 is about 11324.1517121593. The cubic root of 128236412 is about 504.2785004408.

It can be divided in two parts, 12823 and 6412, that multiplied together give a triangular number (82221076 = T₁₂₈₂₃).

The spelling of 128236412 in words is "one hundred twenty-eight million, two hundred thirty-six thousand, four hundred twelve".