268591656 has 32 divisors (see below), whose sum is σ = 687859200. Its totient is φ = 87346560.

The previous prime is 268591633. The next prime is 268591679. The reversal of 268591656 is 656195862.

It is an interprime number because it is at equal distance from previous prime (268591633) and next prime (268591679).

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 135496 + ... + 137463.

It is an arithmetic number, because the mean of its divisors is an integer number (21495600).

Almost surely, 2^268591656 is an apocalyptic number.

It is an amenable number.

268591656 is an abundant number, since it is smaller than the sum of its proper divisors (419267544).

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

268591656 is a wasteful number, since it uses less digits than its factorization.

268591656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273009 (or 273005 counting only the distinct ones).

The product of its digits is 777600, while the sum is 48.

The square root of 268591656 is about 16388.7661524594. The cubic root of 268591656 is about 645.2046751442.

The spelling of 268591656 in words is "two hundred sixty-eight million, five hundred ninety-one thousand, six hundred fifty-six".