256988160 has 528 divisors, whose sum is σ = 1078850880. Its totient is φ = 57507840.

The previous prime is 256988159. The next prime is 256988161. The reversal of 256988160 is 61889652.

256988160 is a `hidden beast` number, since 2 + 569 + 8 + 81 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (256988159) and next prime (256988161).

It is a tau number, because it is divible by the number of its divisors (528).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256988161) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 19768314 + ... + 19768326.

Almost surely, 2^256988160 is an apocalyptic number.

256988160 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 256988160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539425440).

256988160 is an abundant number, since it is smaller than the sum of its proper divisors (821862720).

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

256988160 is a wasteful number, since it uses less digits than its factorization.

256988160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 34 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 256988160 is about 16030.8502581741. The cubic root of 256988160 is about 635.7763542597.

The spelling of 256988160 in words is "two hundred fifty-six million, nine hundred eighty-eight thousand, one hundred sixty".