256934188 has 48 divisors (see below), whose sum is σ = 542993920. Its totient is φ = 103918464.

The previous prime is 256934123. The next prime is 256934191. The reversal of 256934188 is 881439652.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165745 + ... + 167287.

Almost surely, 2^256934188 is an apocalyptic number.

256934188 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256934188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271496960).

256934188 is an abundant number, since it is smaller than the sum of its proper divisors (286059732).

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

256934188 is a wasteful number, since it uses less digits than its factorization.

256934188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1886 (or 1884 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 256934188 is about 16029.1667905727. The cubic root of 256934188 is about 635.7318430991.

The spelling of 256934188 in words is "two hundred fifty-six million, nine hundred thirty-four thousand, one hundred eighty-eight".