268721240 has 16 divisors (see below), whose sum is σ = 604622880. Its totient is φ = 107488480.

The previous prime is 268721239. The next prime is 268721251. The reversal of 268721240 is 42127862.

268721240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×268721240² = 144422209654275200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 268721197 and 268721206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3358976 + ... + 3359055.

It is an arithmetic number, because the mean of its divisors is an integer number (37788930).

Almost surely, 2^268721240 is an apocalyptic number.

268721240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268721240 is an abundant number, since it is smaller than the sum of its proper divisors (335901640).

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

268721240 is a wasteful number, since it uses less digits than its factorization.

268721240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6718042 (or 6718038 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 32.

The square root of 268721240 is about 16392.7191155098. The cubic root of 268721240 is about 645.3084196929.

The spelling of 268721240 in words is "two hundred sixty-eight million, seven hundred twenty-one thousand, two hundred forty".