238431 has 16 divisors (see below), whose sum is σ = 345600. Its totient is φ = 145728.

The previous prime is 238423. The next prime is 238439. The reversal of 238431 is 134832.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (238423) and next prime (238439).

It is not a de Polignac number, because 238431 - 2³ = 238423 is a prime.

It is a super-2 number, since 2×238431² = 113698683522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 238398 and 238407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (238439) 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, 2635 + ... + 2723.

It is an arithmetic number, because the mean of its divisors is an integer number (21600).

2²³⁸⁴³¹ is an apocalyptic number.

238431 is a deficient number, since it is larger than the sum of its proper divisors (107169).

238431 is a wasteful number, since it uses less digits than its factorization.

238431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158.

The product of its digits is 576, while the sum is 21.

The square root of 238431 is about 488.2939688343. The cubic root of 238431 is about 62.0089303820.

It can be divided in two parts, 2384 and 31, that added together give a triangular number (2415 = T₆₉).

The spelling of 238431 in words is "two hundred thirty-eight thousand, four hundred thirty-one".