256340278 has 8 divisors (see below), whose sum is σ = 385061040. Its totient is φ = 127986600.

The previous prime is 256340257. The next prime is 256340291. The reversal of 256340278 is 872043652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90018 + ... + 92821.

It is an arithmetic number, because the mean of its divisors is an integer number (48132630).

Almost surely, 2^256340278 is an apocalyptic number.

256340278 is a deficient number, since it is larger than the sum of its proper divisors (128720762).

256340278 is a wasteful number, since it uses less digits than its factorization.

256340278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 183542.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 256340278 is about 16010.6301562431. The cubic root of 256340278 is about 635.2416283414.

The spelling of 256340278 in words is "two hundred fifty-six million, three hundred forty thousand, two hundred seventy-eight".