257730916 has 27 divisors (see below), whose sum is σ = 472846521. Its totient is φ = 122909424.

The previous prime is 257730911. The next prime is 257730919. The reversal of 257730916 is 619037752.

The square root of 257730916 is 16054.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 189172516 + 68558400 = 13754^2 + 8280^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257730911) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 738310 + ... + 738658.

Almost surely, 2^257730916 is an apocalyptic number.

257730916 is the 16054-th square number.

It is an amenable number.

257730916 is a deficient number, since it is larger than the sum of its proper divisors (215115605).

257730916 is an equidigital number, since it uses as much as digits as its factorization.

257730916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 79380, while the sum is 40.

The cubic root of 257730916 is about 636.3882793153.

The spelling of 257730916 in words is "two hundred fifty-seven million, seven hundred thirty thousand, nine hundred sixteen".