257886160 has 80 divisors (see below), whose sum is σ = 687456000. Its totient is φ = 88132608.

The previous prime is 257886127. The next prime is 257886173. The reversal of 257886160 is 61688752.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 245316 + ... + 246364.

It is an arithmetic number, because the mean of its divisors is an integer number (8593200).

Almost surely, 2^257886160 is an apocalyptic number.

257886160 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 257886160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (343728000).

257886160 is an abundant number, since it is smaller than the sum of its proper divisors (429569840).

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

257886160 is a wasteful number, since it uses less digits than its factorization.

257886160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1508 (or 1502 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 257886160 is about 16058.8343288048. The cubic root of 257886160 is about 636.5160296499.

The spelling of 257886160 in words is "two hundred fifty-seven million, eight hundred eighty-six thousand, one hundred sixty".