287238 has 24 divisors (see below), whose sum is σ = 668952. Its totient is φ = 81984.

The previous prime is 287237. The next prime is 287239. The reversal of 287238 is 832782.

It is an interprime number because it is at equal distance from previous prime (287237) and next prime (287239).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2² + 8² + 2¹³ + 7⁵ + 3³ + 8⁶ .

It is a Curzon 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 287238.

It is not an unprimeable number, because it can be changed into a prime (287233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 195 + ... + 782.

It is an arithmetic number, because the mean of its divisors is an integer number (27873).

2²⁸⁷²³⁸ is an apocalyptic number.

287238 is an abundant number, since it is smaller than the sum of its proper divisors (381714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

287238 is a wasteful number, since it uses less digits than its factorization.

287238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996 (or 989 counting only the distinct ones).

The product of its digits is 5376, while the sum is 30.

The square root of 287238 is about 535.9458927914. The cubic root of 287238 is about 65.9802512079.

It can be divided in two parts, 287 and 238, that added together give a palindrome (525).

The spelling of 287238 in words is "two hundred eighty-seven thousand, two hundred thirty-eight".