268890 has 16 divisors (see below), whose sum is σ = 645408. Its totient is φ = 71696.

The previous prime is 268883. The next prime is 268897. The reversal of 268890 is 98862.

It is an interprime number because it is at equal distance from previous prime (268883) and next prime (268897).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (268897) by changing a digit.

268890 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4452 + ... + 4511.

It is an arithmetic number, because the mean of its divisors is an integer number (40338).

2²⁶⁸⁸⁹⁰ is an apocalyptic number.

268890 is an abundant number, since it is smaller than the sum of its proper divisors (376518).

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

268890 is a wasteful number, since it uses less digits than its factorization.

268890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8973.

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

The square root of 268890 is about 518.5460442429. The cubic root of 268890 is about 64.5443478437.

The spelling of 268890 in words is "two hundred sixty-eight thousand, eight hundred ninety".