288618 has 16 divisors (see below), whose sum is σ = 629856. Its totient is φ = 87440.

The previous prime is 288583. The next prime is 288647. The reversal of 288618 is 816882.

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

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 288618.

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, 2121 + ... + 2252.

It is an arithmetic number, because the mean of its divisors is an integer number (39366).

2²⁸⁸⁶¹⁸ is an apocalyptic number.

288618 is an abundant number, since it is smaller than the sum of its proper divisors (341238).

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

288618 is a wasteful number, since it uses less digits than its factorization.

288618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4389.

The product of its digits is 6144, while the sum is 33.

The square root of 288618 is about 537.2317935491. The cubic root of 288618 is about 66.0857471350.

It can be divided in two parts, 28 and 8618, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 288618 in words is "two hundred eighty-eight thousand, six hundred eighteen".