257327780 has 12 divisors (see below), whose sum is σ = 540388380. Its totient is φ = 102931104.

The previous prime is 257327743. The next prime is 257327783. The reversal of 257327780 is 87723752.

It can be written as a sum of positive squares in 2 ways, for example, as 177475684 + 79852096 = 13322^2 + 8936^2 .

It is not an unprimeable number, because it can be changed into a prime (257327783) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6433175 + ... + 6433214.

It is an arithmetic number, because the mean of its divisors is an integer number (45032365).

Almost surely, 2^257327780 is an apocalyptic number.

257327780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257327780 is an abundant number, since it is smaller than the sum of its proper divisors (283060600).

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

257327780 is a wasteful number, since it uses less digits than its factorization.

257327780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12866398 (or 12866396 counting only the distinct ones).

The product of its (nonzero) digits is 164640, while the sum is 41.

The square root of 257327780 is about 16041.4394615945. The cubic root of 257327780 is about 636.0562988281.

The spelling of 257327780 in words is "two hundred fifty-seven million, three hundred twenty-seven thousand, seven hundred eighty".