256197836 has 12 divisors (see below), whose sum is σ = 448534128. Its totient is φ = 128045232.

The previous prime is 256197829. The next prime is 256197839. The reversal of 256197836 is 638791652.

It is not an unprimeable number, because it can be changed into a prime (256197839) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1511 + ... + 22686.

It is an arithmetic number, because the mean of its divisors is an integer number (37377844).

Almost surely, 2^256197836 is an apocalyptic number.

It is an amenable number.

256197836 is a deficient number, since it is larger than the sum of its proper divisors (192336292).

256197836 is a wasteful number, since it uses less digits than its factorization.

256197836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26848 (or 26846 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 256197836 is about 16006.1811810313. The cubic root of 256197836 is about 635.1239438141.

The spelling of 256197836 in words is "two hundred fifty-six million, one hundred ninety-seven thousand, eight hundred thirty-six".