257838142 has 16 divisors (see below), whose sum is σ = 410417280. Its totient is φ = 121222552.

The previous prime is 257838137. The next prime is 257838143. The reversal of 257838142 is 241838752.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 257838095 and 257838104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257838143) 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 7 ways as a sum of consecutive naturals, for example, 44788 + ... + 50215.

It is an arithmetic number, because the mean of its divisors is an integer number (25651080).

Almost surely, 2^257838142 is an apocalyptic number.

257838142 is a deficient number, since it is larger than the sum of its proper divisors (152579138).

257838142 is a wasteful number, since it uses less digits than its factorization.

257838142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95087.

The product of its digits is 107520, while the sum is 40.

The square root of 257838142 is about 16057.3391942750. The cubic root of 257838142 is about 636.4765211009.

The spelling of 257838142 in words is "two hundred fifty-seven million, eight hundred thirty-eight thousand, one hundred forty-two".