257240344 has 16 divisors (see below), whose sum is σ = 482784120. Its totient is φ = 128497920.

The previous prime is 257240341. The next prime is 257240359. The reversal of 257240344 is 443042752.

It is a happy number.

257240344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257240341) 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, 6009 + ... + 23464.

Almost surely, 2^257240344 is an apocalyptic number.

It is an amenable number.

257240344 is a deficient number, since it is larger than the sum of its proper divisors (225543776).

257240344 is a wasteful number, since it uses less digits than its factorization.

257240344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30570 (or 30566 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 31.

The square root of 257240344 is about 16038.7139135281. The cubic root of 257240344 is about 635.9842499693.

The spelling of 257240344 in words is "two hundred fifty-seven million, two hundred forty thousand, three hundred forty-four".