256710 has 32 divisors (see below), whose sum is σ = 633600. Its totient is φ = 66528.

The previous prime is 256699. The next prime is 256721. The reversal of 256710 is 17652.

It is an interprime number because it is at equal distance from previous prime (256699) and next prime (256721).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1191 + ... + 1389.

It is an arithmetic number, because the mean of its divisors is an integer number (19800).

2²⁵⁶⁷¹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (316800).

256710 is an abundant number, since it is smaller than the sum of its proper divisors (376890).

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

256710 is a wasteful number, since it uses less digits than its factorization.

256710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 256710 is about 506.6655701743. The cubic root of 256710 is about 63.5546886626.

The spelling of 256710 in words is "two hundred fifty-six thousand, seven hundred ten".