256338018 has 48 divisors (see below), whose sum is σ = 576763200. Its totient is φ = 82182240.

The previous prime is 256338001. The next prime is 256338023. The reversal of 256338018 is 810833652.

256338018 is a `hidden beast` number, since 2 + 5 + 633 + 8 + 0 + 18 = 666.

256338018 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161553 + ... + 163131.

It is an arithmetic number, because the mean of its divisors is an integer number (12015900).

Almost surely, 2^256338018 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256338018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288381600).

256338018 is an abundant number, since it is smaller than the sum of its proper divisors (320425182).

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

256338018 is a wasteful number, since it uses less digits than its factorization.

256338018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927 (or 1924 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 256338018 is about 16010.5595779785. The cubic root of 256338018 is about 635.2397614865.

The spelling of 256338018 in words is "two hundred fifty-six million, three hundred thirty-eight thousand, eighteen".