256343528 has 48 divisors (see below), whose sum is σ = 569006880. Its totient is φ = 106053696.

The previous prime is 256343519. The next prime is 256343537. The reversal of 256343528 is 825343652.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (256343519) and next prime (256343537).

It is a junction number, because it is equal to n+sod(n) for n = 256343491 and 256343500.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44375 + ... + 49817.

It is an arithmetic number, because the mean of its divisors is an integer number (11854310).

Almost surely, 2^256343528 is an apocalyptic number.

256343528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256343528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (284503440).

256343528 is an abundant number, since it is smaller than the sum of its proper divisors (312663352).

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

256343528 is a wasteful number, since it uses less digits than its factorization.

256343528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5514 (or 5481 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

The square root of 256343528 is about 16010.7316509896. The cubic root of 256343528 is about 635.2443129586.

The spelling of 256343528 in words is "two hundred fifty-six million, three hundred forty-three thousand, five hundred twenty-eight".