256547070 has 144 divisors (see below), whose sum is σ = 733797792. Its totient is φ = 62150400.

The previous prime is 256547033. The next prime is 256547089. The reversal of 256547070 is 70745652.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 1536127 + ... + 1536293.

It is an arithmetic number, because the mean of its divisors is an integer number (5095818).

Almost surely, 2^256547070 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256547070, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (366898896).

256547070 is an abundant number, since it is smaller than the sum of its proper divisors (477250722).

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

256547070 is a wasteful number, since it uses less digits than its factorization.

256547070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 58800, while the sum is 36.

The square root of 256547070 is about 16017.0868137748. The cubic root of 256547070 is about 635.4124008003.

The spelling of 256547070 in words is "two hundred fifty-six million, five hundred forty-seven thousand, seventy".