290668 has 18 divisors (see below), whose sum is σ = 592116. Its totient is φ = 124488.

The previous prime is 290663. The next prime is 290669. The reversal of 290668 is 866092.

It is not an unprimeable number, because it can be changed into a prime (290663) by changing a digit.

290668 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 (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 546 + ... + 937.

2²⁹⁰⁶⁶⁸ is an apocalyptic number.

290668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

290668 is an abundant number, since it is smaller than the sum of its proper divisors (301448).

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

290668 is a wasteful number, since it uses less digits than its factorization.

290668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1501 (or 1492 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 290668 is about 539.1363463912. The cubic root of 290668 is about 66.2418430684.

The spelling of 290668 in words is "two hundred ninety thousand, six hundred sixty-eight".