238918399 has 4 divisors (see below), whose sum is σ = 239001840. Its totient is φ = 238834960.

The previous prime is 238918373. The next prime is 238918403. The reversal of 238918399 is 993819832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 238918399 - 2²³ = 230529791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238913399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37267 + ... + 43204.

It is an arithmetic number, because the mean of its divisors is an integer number (59750460).

Almost surely, 2^238918399 is an apocalyptic number.

238918399 is a deficient number, since it is larger than the sum of its proper divisors (83441).

238918399 is an equidigital number, since it uses as much as digits as its factorization.

238918399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83440.

The product of its digits is 839808, while the sum is 52.

The square root of 238918399 is about 15456.9854434815. The cubic root of 238918399 is about 620.5115436586.

The spelling of 238918399 in words is "two hundred thirty-eight million, nine hundred eighteen thousand, three hundred ninety-nine".