256341340 has 24 divisors (see below), whose sum is σ = 540271872. Its totient is φ = 102164160.

The previous prime is 256341329. The next prime is 256341343. The reversal of 256341340 is 43143652.

It is a junction number, because it is equal to n+sod(n) for n = 256341299 and 256341308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256341343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17596 + ... + 28675.

It is an arithmetic number, because the mean of its divisors is an integer number (22511328).

Almost surely, 2^256341340 is an apocalyptic number.

256341340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

256341340 is an abundant number, since it is smaller than the sum of its proper divisors (283930532).

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

256341340 is a wasteful number, since it uses less digits than its factorization.

256341340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46557 (or 46555 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 256341340 is about 16010.6633216741. The cubic root of 256341340 is about 635.2425055942.

Adding to 256341340 its reverse (43143652), we get a palindrome (299484992).

The spelling of 256341340 in words is "two hundred fifty-six million, three hundred forty-one thousand, three hundred forty".