256205070 has 96 divisors (see below), whose sum is σ = 732382560. Its totient is φ = 61624320.

The previous prime is 256205041. The next prime is 256205077. The reversal of 256205070 is 70502652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256205077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134686 + ... + 136574.

It is an arithmetic number, because the mean of its divisors is an integer number (7628985).

Almost surely, 2^256205070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256205070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366191280).

256205070 is an abundant number, since it is smaller than the sum of its proper divisors (476177490).

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

256205070 is a wasteful number, since it uses less digits than its factorization.

256205070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050 (or 2047 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 256205070 is about 16006.4071546365. The cubic root of 256205070 is about 635.1299215427.

The spelling of 256205070 in words is "two hundred fifty-six million, two hundred five thousand, seventy".