256340106 has 128 divisors (see below), whose sum is σ = 671846400. Its totient is φ = 71628480.

The previous prime is 256340101. The next prime is 256340113. The reversal of 256340106 is 601043652.

256340106 is a `hidden beast` number, since 25 + 634 + 0 + 1 + 0 + 6 = 666.

256340106 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 256340106.

It is not an unprimeable number, because it can be changed into a prime (256340101) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 395875 + ... + 396521.

It is an arithmetic number, because the mean of its divisors is an integer number (5248800).

Almost surely, 2^256340106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256340106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (335923200).

256340106 is an abundant number, since it is smaller than the sum of its proper divisors (415506294).

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

256340106 is a wasteful number, since it uses less digits than its factorization.

256340106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 256340106 is about 16010.6247848109. The cubic root of 256340106 is about 635.2414862626.

Adding to 256340106 its reverse (601043652), we get a palindrome (857383758).

The spelling of 256340106 in words is "two hundred fifty-six million, three hundred forty thousand, one hundred six".