288915 has 32 divisors (see below), whose sum is σ = 539136. Its totient is φ = 130560.

The previous prime is 288913. The next prime is 288929. The reversal of 288915 is 519882.

It is a happy number.

It is not a de Polignac number, because 288915 - 2¹ = 288913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (288913) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2754 + ... + 2856.

It is an arithmetic number, because the mean of its divisors is an integer number (16848).

2²⁸⁸⁹¹⁵ is an apocalyptic number.

288915 is a deficient number, since it is larger than the sum of its proper divisors (250221).

288915 is a wasteful number, since it uses less digits than its factorization.

288915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139.

The product of its digits is 5760, while the sum is 33.

The square root of 288915 is about 537.5081394733. The cubic root of 288915 is about 66.1084076970.

Subtracting from 288915 its sum of digits (33), we obtain a palindrome (288882).

The spelling of 288915 in words is "two hundred eighty-eight thousand, nine hundred fifteen".