257448769 has 8 divisors (see below), whose sum is σ = 269498880. Its totient is φ = 245632800.

The previous prime is 257448761. The next prime is 257448781. The reversal of 257448769 is 967844752.

257448769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 257448769 - 2³ = 257448761 is a prime.

It is a super-2 number, since 2×257448769² = 132559737319230722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (257448761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56284 + ... + 60685.

It is an arithmetic number, because the mean of its divisors is an integer number (33687360).

Almost surely, 2^257448769 is an apocalyptic number.

It is an amenable number.

257448769 is a deficient number, since it is larger than the sum of its proper divisors (12050111).

257448769 is a wasteful number, since it uses less digits than its factorization.

257448769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117071.

The product of its digits is 3386880, while the sum is 52.

The square root of 257448769 is about 16045.2101575517. The cubic root of 257448769 is about 636.1559690591.

The spelling of 257448769 in words is "two hundred fifty-seven million, four hundred forty-eight thousand, seven hundred sixty-nine".