257649796 has 12 divisors (see below), whose sum is σ = 463073548. Its totient is φ = 125343072.

The previous prime is 257649793. The next prime is 257649809. The reversal of 257649796 is 697946752.

It can be written as a sum of positive squares in 2 ways, for example, as 152176896 + 105472900 = 12336^2 + 10270^2 .

It is not an unprimeable number, because it can be changed into a prime (257649793) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 870291 + ... + 870586.

Almost surely, 2^257649796 is an apocalyptic number.

It is an amenable number.

257649796 is a deficient number, since it is larger than the sum of its proper divisors (205423752).

257649796 is a wasteful number, since it uses less digits than its factorization.

257649796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1740918 (or 1740916 counting only the distinct ones).

The product of its digits is 5715360, while the sum is 55.

The square root of 257649796 is about 16051.4733280157. The cubic root of 257649796 is about 636.3215052355.

The spelling of 257649796 in words is "two hundred fifty-seven million, six hundred forty-nine thousand, seven hundred ninety-six".