256087668 has 48 divisors (see below), whose sum is σ = 608670720. Its totient is φ = 83781984.

The previous prime is 256087633. The next prime is 256087673. The reversal of 256087668 is 866780652.

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 a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355813 + ... + 356531.

It is an arithmetic number, because the mean of its divisors is an integer number (12680640).

Almost surely, 2^256087668 is an apocalyptic number.

It is an amenable number.

256087668 is an abundant number, since it is smaller than the sum of its proper divisors (352583052).

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

256087668 is a wasteful number, since it uses less digits than its factorization.

256087668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236 (or 1234 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 48.

The square root of 256087668 is about 16002.7393904919. The cubic root of 256087668 is about 635.0328939085.

The spelling of 256087668 in words is "two hundred fifty-six million, eighty-seven thousand, six hundred sixty-eight".