240856 has 64 divisors (see below), whose sum is σ = 622080. Its totient is φ = 84480.

The previous prime is 240853. The next prime is 240859. The reversal of 240856 is 658042.

It is an interprime number because it is at equal distance from previous prime (240853) and next prime (240859).

It is a super-2 number, since 2×240856² = 116023225472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 240856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (240853) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10461 + ... + 10483.

It is an arithmetic number, because the mean of its divisors is an integer number (9720).

2²⁴⁰⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 240856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311040).

240856 is an abundant number, since it is smaller than the sum of its proper divisors (381224).

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

240856 is a wasteful number, since it uses less digits than its factorization.

240856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 60 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 240856 is about 490.7708222786. The cubic root of 240856 is about 62.2184455380.

Adding to 240856 its reverse (658042), we get a palindrome (898898).

The spelling of 240856 in words is "two hundred forty thousand, eight hundred fifty-six".