256425500 has 48 divisors (see below), whose sum is σ = 565385184. Its totient is φ = 101590400.

The previous prime is 256425493. The next prime is 256425509. The reversal of 256425500 is 5524652.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256425509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51104 + ... + 55896.

It is an arithmetic number, because the mean of its divisors is an integer number (11778858).

Almost surely, 2^256425500 is an apocalyptic number.

256425500 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 256425500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282692592).

256425500 is an abundant number, since it is smaller than the sum of its proper divisors (308959684).

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

256425500 is a wasteful number, since it uses less digits than its factorization.

256425500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919 (or 4907 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 256425500 is about 16013.2913543718. The cubic root of 256425500 is about 635.3120172846.

The spelling of 256425500 in words is "two hundred fifty-six million, four hundred twenty-five thousand, five hundred".