687056256 has 224 divisors, whose sum is σ = 2118234000. Its totient is φ = 221709312.

The previous prime is 687056243. The next prime is 687056267. The reversal of 687056256 is 652650786.

687056256 is a `hidden beast` number, since 6 + 87 + 0 + 562 + 5 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 3452445 + ... + 3452643.

Almost surely, 2^687056256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 687056256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059117000).

687056256 is an abundant number, since it is smaller than the sum of its proper divisors (1431177744).

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

687056256 is an equidigital number, since it uses as much as digits as its factorization.

687056256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 604800, while the sum is 45.

The square root of 687056256 is about 26211.7579723299. The cubic root of 687056256 is about 882.3971555820.

The spelling of 687056256 in words is "six hundred eighty-seven million, fifty-six thousand, two hundred fifty-six".