290868 has 12 divisors (see below), whose sum is σ = 678720. Its totient is φ = 96952.

The previous prime is 290861. The next prime is 290869. The reversal of 290868 is 868092.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 290868.

It is not an unprimeable number, because it can be changed into a prime (290861) by changing a digit.

290868 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 12108 + ... + 12131.

It is an arithmetic number, because the mean of its divisors is an integer number (56560).

2²⁹⁰⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

290868 is an abundant number, since it is smaller than the sum of its proper divisors (387852).

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

290868 is a wasteful number, since it uses less digits than its factorization.

290868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24246 (or 24244 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 290868 is about 539.3217963331. The cubic root of 290868 is about 66.2570325986.

The spelling of 290868 in words is "two hundred ninety thousand, eight hundred sixty-eight".