288779 has 4 divisors (see below), whose sum is σ = 305784. Its totient is φ = 271776.

The previous prime is 288773. The next prime is 288803. The reversal of 288779 is 977882.

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

It is a cyclic number.

It is not a de Polignac number, because 288779 - 2¹⁶ = 223243 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 288779.

It is not an unprimeable number, because it can be changed into a prime (288773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8477 + ... + 8510.

It is an arithmetic number, because the mean of its divisors is an integer number (76446).

2²⁸⁸⁷⁷⁹ is an apocalyptic number.

288779 is a deficient number, since it is larger than the sum of its proper divisors (17005).

288779 is a wasteful number, since it uses less digits than its factorization.

288779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17004.

The product of its digits is 56448, while the sum is 41.

The square root of 288779 is about 537.3816148697. The cubic root of 288779 is about 66.0980330718.

The spelling of 288779 in words is "two hundred eighty-eight thousand, seven hundred seventy-nine".