256441064 has 16 divisors (see below), whose sum is σ = 524538720. Its totient is φ = 116564080.

The previous prime is 256441063. The next prime is 256441079. The reversal of 256441064 is 460144652.

It is a self number, because there is not a number n which added to its sum of digits gives 256441064.

It is not an unprimeable number, because it can be changed into a prime (256441063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1456964 + ... + 1457139.

It is an arithmetic number, because the mean of its divisors is an integer number (32783670).

Almost surely, 2^256441064 is an apocalyptic number.

It is an amenable number.

256441064 is an abundant number, since it is smaller than the sum of its proper divisors (268097656).

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

256441064 is a wasteful number, since it uses less digits than its factorization.

256441064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2914120 (or 2914116 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 256441064 is about 16013.7773182969. Note that the first 3 decimals coincide. The cubic root of 256441064 is about 635.3248706555.

The spelling of 256441064 in words is "two hundred fifty-six million, four hundred forty-one thousand, sixty-four".