288238 has 8 divisors (see below), whose sum is σ = 446400. Its totient is φ = 139440.

The previous prime is 288227. The next prime is 288241. The reversal of 288238 is 832882.

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

It is a super-2 number, since 2×288238² = 166162289288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a congruent number.

It is an unprimeable number.

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, 2263 + ... + 2386.

It is an arithmetic number, because the mean of its divisors is an integer number (55800).

2²⁸⁸²³⁸ is an apocalyptic number.

288238 is a deficient number, since it is larger than the sum of its proper divisors (158162).

288238 is a wasteful number, since it uses less digits than its factorization.

288238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4682.

The product of its digits is 6144, while the sum is 31.

The square root of 288238 is about 536.8780122151. The cubic root of 288238 is about 66.0567311425.

Subtracting 288238 from its reverse (832882), we obtain a square (544644 = 738²).

The spelling of 288238 in words is "two hundred eighty-eight thousand, two hundred thirty-eight".