238218393 has 16 divisors (see below), whose sum is σ = 363712896. Its totient is φ = 135857280.

The previous prime is 238218373. The next prime is 238218437. The reversal of 238218393 is 393812832.

It is not a de Polignac number, because 238218393 - 2¹⁶ = 238152857 is a prime.

It is a super-3 number, since 3×238218393³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (238218373) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55 + ... + 21827.

It is an arithmetic number, because the mean of its divisors is an integer number (22732056).

Almost surely, 2^238218393 is an apocalyptic number.

It is an amenable number.

238218393 is a deficient number, since it is larger than the sum of its proper divisors (125494503).

238218393 is a wasteful number, since it uses less digits than its factorization.

238218393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22304.

The product of its digits is 62208, while the sum is 39.

The square root of 238218393 is about 15434.3251553153. The cubic root of 238218393 is about 619.9049394667.

The spelling of 238218393 in words is "two hundred thirty-eight million, two hundred eighteen thousand, three hundred ninety-three".