256020170 has 32 divisors (see below), whose sum is σ = 557653248. Its totient is φ = 82614528.

The previous prime is 256020161. The next prime is 256020197. The reversal of 256020170 is 71020652.

256020170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 106382 + ... + 108761.

It is an arithmetic number, because the mean of its divisors is an integer number (17426664).

Almost surely, 2^256020170 is an apocalyptic number.

256020170 is an abundant number, since it is smaller than the sum of its proper divisors (301633078).

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

256020170 is a wasteful number, since it uses less digits than its factorization.

256020170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215174.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 256020170 is about 16000.6303000851. The cubic root of 256020170 is about 634.9770963281.

The spelling of 256020170 in words is "two hundred fifty-six million, twenty thousand, one hundred seventy".