288730 has 16 divisors (see below), whose sum is σ = 559944. Its totient is φ = 106560.

The previous prime is 288697. The next prime is 288731. The reversal of 288730 is 37882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 205209 + 83521 = 453^2 + 289^2 .

It is not an unprimeable number, because it can be changed into a prime (288731) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 981 + ... + 1240.

2²⁸⁸⁷³⁰ is an apocalyptic number.

288730 is a deficient number, since it is larger than the sum of its proper divisors (271214).

288730 is a wasteful number, since it uses less digits than its factorization.

288730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2241.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 288730 is about 537.3360214987. The cubic root of 288730 is about 66.0942943572.

The spelling of 288730 in words is "two hundred eighty-eight thousand, seven hundred thirty".