238491 has 24 divisors (see below), whose sum is σ = 393680. Its totient is φ = 142560.

The previous prime is 238481. The next prime is 238499. The reversal of 238491 is 194832.

It is not a de Polignac number, because 238491 - 2⁷ = 238363 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 238491.

It is not an unprimeable number, because it can be changed into a prime (238499) 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 23 ways as a sum of consecutive naturals, for example, 3231 + ... + 3303.

2²³⁸⁴⁹¹ is an apocalyptic number.

238491 is a deficient number, since it is larger than the sum of its proper divisors (155189).

238491 is a wasteful number, since it uses less digits than its factorization.

238491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 87 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 238491 is about 488.3554033693. The cubic root of 238491 is about 62.0141313609.

It can be divided in two parts, 238 and 491, that added together give a 6-th power (729 = 3⁶).

The spelling of 238491 in words is "two hundred thirty-eight thousand, four hundred ninety-one".