238404789 has 20 divisors (see below), whose sum is σ = 407013024. Its totient is φ = 136230984.

The previous prime is 238404773. The next prime is 238404809. The reversal of 238404789 is 987404832.

238404789 is a `hidden beast` number, since 238 + 404 + 7 + 8 + 9 = 666.

It is not a de Polignac number, because 238404789 - 2⁴ = 238404773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238404589) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 209667 + ... + 210800.

Almost surely, 2^238404789 is an apocalyptic number.

It is an amenable number.

238404789 is a deficient number, since it is larger than the sum of its proper divisors (168608235).

238404789 is an equidigital number, since it uses as much as digits as its factorization.

238404789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420486 (or 420477 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The square root of 238404789 is about 15440.3623338314. The cubic root of 238404789 is about 620.0665806056.

The spelling of 238404789 in words is "two hundred thirty-eight million, four hundred four thousand, seven hundred eighty-nine".