256470 has 32 divisors (see below), whose sum is σ = 628992. Its totient is φ = 66912.

The previous prime is 256469. The next prime is 256471. The reversal of 256470 is 74652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256469) and next prime (256471).

It is a self number, because there is not a number n which added to its sum of digits gives 256470.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 256470.

It is not an unprimeable number, because it can be changed into a prime (256471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2439 + ... + 2541.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

2²⁵⁶⁴⁷⁰ is an apocalyptic number.

256470 is an abundant number, since it is smaller than the sum of its proper divisors (372522).

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

256470 is a wasteful number, since it uses less digits than its factorization.

256470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 256470 is about 506.4286721741. The cubic root of 256470 is about 63.5348765774.

The spelling of 256470 in words is "two hundred fifty-six thousand, four hundred seventy".