256525830 has 96 divisors (see below), whose sum is σ = 741480480. Its totient is φ = 61002240.

The previous prime is 256525817. The next prime is 256525849. The reversal of 256525830 is 38525652.

It is a happy number.

256525830 is a `hidden beast` number, since 2 + 56 + 525 + 83 + 0 = 666.

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 47 ways as a sum of consecutive naturals, for example, 50026 + ... + 54914.

It is an arithmetic number, because the mean of its divisors is an integer number (7723755).

Almost surely, 2^256525830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 256525830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (370740240).

256525830 is an abundant number, since it is smaller than the sum of its proper divisors (484954650).

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

256525830 is a wasteful number, since it uses less digits than its factorization.

256525830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4966 (or 4963 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

The square root of 256525830 is about 16016.4237581303. The cubic root of 256525830 is about 635.3948646657.

The spelling of 256525830 in words is "two hundred fifty-six million, five hundred twenty-five thousand, eight hundred thirty".