238557493 has 8 divisors (see below), whose sum is σ = 247910400. Its totient is φ = 229308240.

The previous prime is 238557491. The next prime is 238557511. The reversal of 238557493 is 394755832.

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

It is not a de Polignac number, because 238557493 - 2¹ = 238557491 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 (238557491) 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, 21205 + ... + 30442.

It is an arithmetic number, because the mean of its divisors is an integer number (30988800).

Almost surely, 2^238557493 is an apocalyptic number.

It is an amenable number.

238557493 is a deficient number, since it is larger than the sum of its proper divisors (9352907).

238557493 is a wasteful number, since it uses less digits than its factorization.

238557493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51827.

The product of its digits is 907200, while the sum is 46.

The square root of 238557493 is about 15445.3065039189. The cubic root of 238557493 is about 620.1989415345.

The spelling of 238557493 in words is "two hundred thirty-eight million, five hundred fifty-seven thousand, four hundred ninety-three".