256358378 has 4 divisors (see below), whose sum is σ = 384537570. Its totient is φ = 128179188.

The previous prime is 256358357. The next prime is 256358381. The reversal of 256358378 is 873853652.

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., 227014489 + 29343889 = 15067^2 + 5417^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64089593 + ... + 64089596.

Almost surely, 2^256358378 is an apocalyptic number.

256358378 is a deficient number, since it is larger than the sum of its proper divisors (128179192).

256358378 is a wasteful number, since it uses less digits than its factorization.

256358378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128179191.

The product of its digits is 1209600, while the sum is 47.

The square root of 256358378 is about 16011.1953957223. The cubic root of 256358378 is about 635.2565793055.

The spelling of 256358378 in words is "two hundred fifty-six million, three hundred fifty-eight thousand, three hundred seventy-eight".