128455238 has 8 divisors (see below), whose sum is σ = 202824120. Its totient is φ = 60847200.

The previous prime is 128455237. The next prime is 128455241. The reversal of 128455238 is 832554821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 3380401 = 128455238 / (1 + 2 + 8 + 4 + 5 + 5 + 2 + 3 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128455237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1690163 + ... + 1690238.

It is an arithmetic number, because the mean of its divisors is an integer number (25353015).

Almost surely, 2^128455238 is an apocalyptic number.

128455238 is a deficient number, since it is larger than the sum of its proper divisors (74368882).

128455238 is a wasteful number, since it uses less digits than its factorization.

128455238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3380422.

The product of its digits is 76800, while the sum is 38.

The square root of 128455238 is about 11333.8095096044. The cubic root of 128455238 is about 504.5651754895.

It can be divided in two parts, 128455 and 238, that multiplied together give a triangular number (30572290 = T₇₈₁₉).

The spelling of 128455238 in words is "one hundred twenty-eight million, four hundred fifty-five thousand, two hundred thirty-eight".