238457 has 4 divisors (see below), whose sum is σ = 239460. Its totient is φ = 237456.

The previous prime is 238451. The next prime is 238463. The reversal of 238457 is 754832.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (238451) and next prime (238463).

It can be written as a sum of positive squares in 2 ways, for example, as 18496 + 219961 = 136^2 + 469^2 .

It is a cyclic number.

It is not a de Polignac number, because 238457 - 2⁸ = 238201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (238451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83 + ... + 695.

It is an arithmetic number, because the mean of its divisors is an integer number (59865).

2²³⁸⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

238457 is a deficient number, since it is larger than the sum of its proper divisors (1003).

238457 is an equidigital number, since it uses as much as digits as its factorization.

238457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1002.

The product of its digits is 6720, while the sum is 29.

The square root of 238457 is about 488.3205914151. The cubic root of 238457 is about 62.0111842466.

The spelling of 238457 in words is "two hundred thirty-eight thousand, four hundred fifty-seven".