256886550 has 36 divisors (see below), whose sum is σ = 690169740. Its totient is φ = 68502960.

The previous prime is 256886549. The next prime is 256886561. The reversal of 256886550 is 55688652.

256886550 is a `hidden beast` number, since 2 + 568 + 86 + 5 + 5 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256886496 and 256886505.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 284980 + ... + 285879.

Almost surely, 2^256886550 is an apocalyptic number.

256886550 is an abundant number, since it is smaller than the sum of its proper divisors (433283190).

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

256886550 is a wasteful number, since it uses less digits than its factorization.

256886550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570877 (or 570869 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 45.

The square root of 256886550 is about 16027.6807430146. The cubic root of 256886550 is about 635.6925504619.

The spelling of 256886550 in words is "two hundred fifty-six million, eight hundred eighty-six thousand, five hundred fifty".