128136375 has 24 divisors (see below), whose sum is σ = 230989200. Its totient is φ = 68338800.

The previous prime is 128136373. The next prime is 128136383. The reversal of 128136375 is 573631821.

128136375 is a `hidden beast` number, since 1 + 2 + 8 + 13 + 637 + 5 = 666.

It is not a de Polignac number, because 128136375 - 2¹ = 128136373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128136373) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 55825 + ... + 58074.

It is an arithmetic number, because the mean of its divisors is an integer number (9624550).

Almost surely, 2^128136375 is an apocalyptic number.

128136375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

128136375 is a deficient number, since it is larger than the sum of its proper divisors (102852825).

128136375 is a wasteful number, since it uses less digits than its factorization.

128136375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113920 (or 113907 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 128136375 is about 11319.7338749637. The cubic root of 128136375 is about 504.1473374037.

It can be divided in two parts, 128 and 136375, that added together give a triangular number (136503 = T₅₂₂).

The spelling of 128136375 in words is "one hundred twenty-eight million, one hundred thirty-six thousand, three hundred seventy-five".