257987796 has 48 divisors (see below), whose sum is σ = 663499200. Its totient is φ = 77368320.

The previous prime is 257987783. The next prime is 257987827. The reversal of 257987796 is 697789752.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2730 + ... + 22878.

It is an arithmetic number, because the mean of its divisors is an integer number (13822900).

Almost surely, 2^257987796 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 257987796, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (331749600).

257987796 is an abundant number, since it is smaller than the sum of its proper divisors (405511404).

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

257987796 is a wasteful number, since it uses less digits than its factorization.

257987796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20264 (or 20262 counting only the distinct ones).

The product of its digits is 13335840, while the sum is 60.

The square root of 257987796 is about 16061.9985057900. The cubic root of 257987796 is about 636.5996381774.

The spelling of 257987796 in words is "two hundred fifty-seven million, nine hundred eighty-seven thousand, seven hundred ninety-six".