257388845 has 16 divisors (see below), whose sum is σ = 357965568. Its totient is φ = 174007680.

The previous prime is 257388827. The next prime is 257388847. The reversal of 257388845 is 548883752.

It is a happy number.

It is not a de Polignac number, because 257388845 - 2⁸ = 257388589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 257388793 and 257388802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257388847) 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 15 ways as a sum of consecutive naturals, for example, 49304 + ... + 54273.

It is an arithmetic number, because the mean of its divisors is an integer number (22372848).

Almost surely, 2^257388845 is an apocalyptic number.

It is an amenable number.

257388845 is a deficient number, since it is larger than the sum of its proper divisors (100576723).

257388845 is a wasteful number, since it uses less digits than its factorization.

257388845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103660.

The product of its digits is 2150400, while the sum is 50.

The square root of 257388845 is about 16043.3427003228. The cubic root of 257388845 is about 636.1066078230.

The spelling of 257388845 in words is "two hundred fifty-seven million, three hundred eighty-eight thousand, eight hundred forty-five".