256430 has 8 divisors (see below), whose sum is σ = 461592. Its totient is φ = 102568.

The previous prime is 256423. The next prime is 256441. The reversal of 256430 is 34652.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a d-powerful number, because it can be written as 2⁷ + 5⁷ + 4⁵ + 6 + 3¹¹ + 0 .

It is a congruent number.

It is an unprimeable number.

256430 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12812 + ... + 12831.

It is an arithmetic number, because the mean of its divisors is an integer number (57699).

2²⁵⁶⁴³⁰ is an apocalyptic number.

256430 is a deficient number, since it is larger than the sum of its proper divisors (205162).

256430 is a wasteful number, since it uses less digits than its factorization.

256430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 256430 is about 506.3891783994. The cubic root of 256430 is about 63.5315733617.

It can be divided in two parts, 256 and 430, that added together give a palindrome (686).

The spelling of 256430 in words is "two hundred fifty-six thousand, four hundred thirty".