288623 has 4 divisors (see below), whose sum is σ = 289800. Its totient is φ = 287448.

The previous prime is 288583. The next prime is 288647. The reversal of 288623 is 326882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 288623 - 2⁶ = 288559 is a prime.

It is a super-2 number, since 2×288623² = 166606472258, which contains 22 as substring.

It is an Ulam number.

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 288623.

It is not an unprimeable number, because it can be changed into a prime (288653) 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, 65 + ... + 762.

It is an arithmetic number, because the mean of its divisors is an integer number (72450).

2²⁸⁸⁶²³ is an apocalyptic number.

288623 is a deficient number, since it is larger than the sum of its proper divisors (1177).

288623 is an equidigital number, since it uses as much as digits as its factorization.

288623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1176.

The product of its digits is 4608, while the sum is 29.

The square root of 288623 is about 537.2364470138. The cubic root of 288623 is about 66.0861287546.

The spelling of 288623 in words is "two hundred eighty-eight thousand, six hundred twenty-three".