268506840 has 128 divisors (see below), whose sum is σ = 974799360. Its totient is φ = 57759744.

The previous prime is 268506839. The next prime is 268506883. The reversal of 268506840 is 48605862.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4879 + ... + 23681.

It is an arithmetic number, because the mean of its divisors is an integer number (7615620).

Almost surely, 2^268506840 is an apocalyptic number.

268506840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 268506840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (487399680).

268506840 is an abundant number, since it is smaller than the sum of its proper divisors (706292520).

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

268506840 is a wasteful number, since it uses less digits than its factorization.

268506840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18841 (or 18837 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The square root of 268506840 is about 16386.1783219883. The cubic root of 268506840 is about 645.1367536486.

The spelling of 268506840 in words is "two hundred sixty-eight million, five hundred six thousand, eight hundred forty".