256961852 has 48 divisors (see below), whose sum is σ = 558458880. Its totient is φ = 100958400.

The previous prime is 256961843. The next prime is 256961863. The reversal of 256961852 is 258169652.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8702 + ... + 24282.

It is an arithmetic number, because the mean of its divisors is an integer number (11634560).

Almost surely, 2^256961852 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256961852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279229440).

256961852 is an abundant number, since it is smaller than the sum of its proper divisors (301497028).

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

256961852 is a wasteful number, since it uses less digits than its factorization.

256961852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15642 (or 15640 counting only the distinct ones).

The product of its digits is 259200, while the sum is 44.

The square root of 256961852 is about 16030.0296942956. The cubic root of 256961852 is about 635.7546586103.

The spelling of 256961852 in words is "two hundred fifty-six million, nine hundred sixty-one thousand, eight hundred fifty-two".