256037378 has 4 divisors (see below), whose sum is σ = 384056070. Its totient is φ = 128018688.

The previous prime is 256037377. The next prime is 256037381. The reversal of 256037378 is 873730652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 232776049 + 23261329 = 15257^2 + 4823^2 .

It is a super-2 number, since 2×256037378² = 131110277866229768, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (256037371) by changing a digit.

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 as a sum of consecutive naturals, namely, 64009343 + ... + 64009346.

Almost surely, 2^256037378 is an apocalyptic number.

256037378 is a deficient number, since it is larger than the sum of its proper divisors (128018692).

256037378 is a wasteful number, since it uses less digits than its factorization.

256037378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128018691.

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 256037378 is about 16001.1680198665. The cubic root of 256037378 is about 634.9913223441.

The spelling of 256037378 in words is "two hundred fifty-six million, thirty-seven thousand, three hundred seventy-eight".