256278210 has 32 divisors (see below), whose sum is σ = 616073472. Its totient is φ = 68229120.

The previous prime is 256278199. The next prime is 256278223. The reversal of 256278210 is 12872652.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12567 + ... + 25893.

It is an arithmetic number, because the mean of its divisors is an integer number (19252296).

Almost surely, 2^256278210 is an apocalyptic number.

256278210 is an abundant number, since it is smaller than the sum of its proper divisors (359795262).

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

256278210 is a wasteful number, since it uses less digits than its factorization.

256278210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13978.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 256278210 is about 16008.6917016976. The cubic root of 256278210 is about 635.1903535796.

The spelling of 256278210 in words is "two hundred fifty-six million, two hundred seventy-eight thousand, two hundred ten".