288778 has 8 divisors (see below), whose sum is σ = 495072. Its totient is φ = 123756.

The previous prime is 288773. The next prime is 288803. The reversal of 288778 is 877882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 288778.

It is not an unprimeable number, because it can be changed into a prime (288773) 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, 10300 + ... + 10327.

It is an arithmetic number, because the mean of its divisors is an integer number (61884).

2²⁸⁸⁷⁷⁸ is an apocalyptic number.

288778 is a deficient number, since it is larger than the sum of its proper divisors (206294).

288778 is a wasteful number, since it uses less digits than its factorization.

288778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20636.

The product of its digits is 50176, while the sum is 40.

The square root of 288778 is about 537.3806844314. The cubic root of 288778 is about 66.0979567757.

The spelling of 288778 in words is "two hundred eighty-eight thousand, seven hundred seventy-eight".