288523 has 4 divisors (see below), whose sum is σ = 291280. Its totient is φ = 285768.

The previous prime is 288499. The next prime is 288527. The reversal of 288523 is 325882.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-288523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 288491 and 288500.

It is not an unprimeable number, because it can be changed into a prime (288527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1215 + ... + 1432.

It is an arithmetic number, because the mean of its divisors is an integer number (72820).

2²⁸⁸⁵²³ is an apocalyptic number.

288523 is a deficient number, since it is larger than the sum of its proper divisors (2757).

288523 is a wasteful number, since it uses less digits than its factorization.

288523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2756.

The product of its digits is 3840, while the sum is 28.

The square root of 288523 is about 537.1433700605. The cubic root of 288523 is about 66.0784955257.

The spelling of 288523 in words is "two hundred eighty-eight thousand, five hundred twenty-three".