256525920 has 384 divisors, whose sum is σ = 1088640000. Its totient is φ = 55074816.

The previous prime is 256525891. The next prime is 256525939. The reversal of 256525920 is 29525652.

256525920 is a `hidden beast` number, since 2 + 5 + 65 + 2 + 592 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 513831 + ... + 514329.

It is an arithmetic number, because the mean of its divisors is an integer number (2835000).

Almost surely, 2^256525920 is an apocalyptic number.

256525920 is a gapful number since it is divisible by the number (20) 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 256525920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (544320000).

256525920 is an abundant number, since it is smaller than the sum of its proper divisors (832114080).

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

256525920 is a wasteful number, since it uses less digits than its factorization.

256525920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 256525920 is about 16016.4265677460. The cubic root of 256525920 is about 635.3949389734.

The spelling of 256525920 in words is "two hundred fifty-six million, five hundred twenty-five thousand, nine hundred twenty".