238128403 has 8 divisors (see below), whose sum is σ = 240967728. Its totient is φ = 235302144.

The previous prime is 238128383. The next prime is 238128413. The reversal of 238128403 is 304821832.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-238128403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238128413) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 36175 + ... + 42247.

It is an arithmetic number, because the mean of its divisors is an integer number (30120966).

Almost surely, 2^238128403 is an apocalyptic number.

238128403 is a deficient number, since it is larger than the sum of its proper divisors (2839325).

238128403 is a wasteful number, since it uses less digits than its factorization.

238128403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6533.

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 238128403 is about 15431.4096245288. The cubic root of 238128403 is about 619.8268706677.

The spelling of 238128403 in words is "two hundred thirty-eight million, one hundred twenty-eight thousand, four hundred three".