128636375 has 32 divisors (see below), whose sum is σ = 185238144. Its totient is φ = 87360000.

The previous prime is 128636371. The next prime is 128636407. The reversal of 128636375 is 573636821.

It is not a de Polignac number, because 128636375 - 2² = 128636371 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128636371) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98225 + ... + 99525.

It is an arithmetic number, because the mean of its divisors is an integer number (5788692).

Almost surely, 2^128636375 is an apocalyptic number.

128636375 is a deficient number, since it is larger than the sum of its proper divisors (56601769).

128636375 is a wasteful number, since it uses less digits than its factorization.

128636375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1436 (or 1426 counting only the distinct ones).

The product of its digits is 181440, while the sum is 41.

The square root of 128636375 is about 11341.7976970143. The cubic root of 128636375 is about 504.8022295217.

The spelling of 128636375 in words is "one hundred twenty-eight million, six hundred thirty-six thousand, three hundred seventy-five".