288780 has 24 divisors (see below), whose sum is σ = 808752. Its totient is φ = 76992.

The previous prime is 288773. The next prime is 288803. The reversal of 288780 is 87882.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 288780.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2347 + ... + 2466.

It is an arithmetic number, because the mean of its divisors is an integer number (33698).

2²⁸⁸⁷⁸⁰ is an apocalyptic number.

288780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

288780 is an abundant number, since it is smaller than the sum of its proper divisors (519972).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

288780 is a wasteful number, since it uses less digits than its factorization.

288780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4825 (or 4823 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 288780 is about 537.3825453064. The cubic root of 288780 is about 66.0981093677.

The spelling of 288780 in words is "two hundred eighty-eight thousand, seven hundred eighty".