256159140 has 96 divisors (see below), whose sum is σ = 775528320. Its totient is φ = 62954496.

The previous prime is 256159139. The next prime is 256159153. The reversal of 256159140 is 41951652.

256159140 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 31 ways as a sum of consecutive naturals, for example, 39144 + ... + 45216.

It is an arithmetic number, because the mean of its divisors is an integer number (8078420).

Almost surely, 2^256159140 is an apocalyptic number.

256159140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256159140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387764160).

256159140 is an abundant number, since it is smaller than the sum of its proper divisors (519369180).

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

256159140 is a wasteful number, since it uses less digits than its factorization.

256159140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6141 (or 6139 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 33.

The square root of 256159140 is about 16004.9723523660. The cubic root of 256159140 is about 635.0919659307.

The spelling of 256159140 in words is "two hundred fifty-six million, one hundred fifty-nine thousand, one hundred forty".