268005640 has 64 divisors (see below), whose sum is σ = 725443200. Its totient is φ = 87049728.

The previous prime is 268005631. The next prime is 268005641. The reversal of 268005640 is 46500862.

It is not an unprimeable number, because it can be changed into a prime (268005641) 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, 19869 + ... + 30508.

It is an arithmetic number, because the mean of its divisors is an integer number (11335050).

Almost surely, 2^268005640 is an apocalyptic number.

268005640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

268005640 is an abundant number, since it is smaller than the sum of its proper divisors (457437560).

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

268005640 is a wasteful number, since it uses less digits than its factorization.

268005640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50414 (or 50410 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 268005640 is about 16370.8778017552. The cubic root of 268005640 is about 644.7350954318.

The spelling of 268005640 in words is "two hundred sixty-eight million, five thousand, six hundred forty".