257946644 has 12 divisors (see below), whose sum is σ = 477960084. Its totient is φ = 121386624.

The previous prime is 257946617. The next prime is 257946649. The reversal of 257946644 is 446649752.

It can be written as a sum of positive squares in 2 ways, for example, as 183331600 + 74615044 = 13540^2 + 8638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257946649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1896599 + ... + 1896734.

It is an arithmetic number, because the mean of its divisors is an integer number (39830007).

Almost surely, 2^257946644 is an apocalyptic number.

It is an amenable number.

257946644 is a deficient number, since it is larger than the sum of its proper divisors (220013440).

257946644 is a wasteful number, since it uses less digits than its factorization.

257946644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3793354 (or 3793352 counting only the distinct ones).

The product of its digits is 1451520, while the sum is 47.

The square root of 257946644 is about 16060.7174185962. The cubic root of 257946644 is about 636.5657880731.

The spelling of 257946644 in words is "two hundred fifty-seven million, nine hundred forty-six thousand, six hundred forty-four".