288445 has 4 divisors (see below), whose sum is σ = 346140. Its totient is φ = 230752.

The previous prime is 288433. The next prime is 288461. The reversal of 288445 is 544882.

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

It can be written as a sum of positive squares in 2 ways, for example, as 71289 + 217156 = 267^2 + 466^2 .

It is a cyclic number.

It is not a de Polignac number, because 288445 - 2⁵ = 288413 is a prime.

It is an Ulam number.

It is a plaindrome in base 16.

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, 28840 + ... + 28849.

It is an arithmetic number, because the mean of its divisors is an integer number (86535).

2²⁸⁸⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

288445 is a deficient number, since it is larger than the sum of its proper divisors (57695).

288445 is an equidigital number, since it uses as much as digits as its factorization.

288445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57694.

The product of its digits is 10240, while the sum is 31.

The square root of 288445 is about 537.0707588391. The cubic root of 288445 is about 66.0725403827.

The spelling of 288445 in words is "two hundred eighty-eight thousand, four hundred forty-five".