257833742 has 8 divisors (see below), whose sum is σ = 386984136. Its totient is φ = 128839032.

The previous prime is 257833739. The next prime is 257833769. The reversal of 257833742 is 247338752.

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

It is a self number, because there is not a number n which added to its sum of digits gives 257833742.

It is a congruent number.

It is an unprimeable number.

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, 34688 + ... + 41459.

It is an arithmetic number, because the mean of its divisors is an integer number (48373017).

Almost surely, 2^257833742 is an apocalyptic number.

257833742 is a deficient number, since it is larger than the sum of its proper divisors (129150394).

257833742 is a wasteful number, since it uses less digits than its factorization.

257833742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77842.

The product of its digits is 282240, while the sum is 41.

The square root of 257833742 is about 16057.2021846896. The cubic root of 257833742 is about 636.4729005962.

The spelling of 257833742 in words is "two hundred fifty-seven million, eight hundred thirty-three thousand, seven hundred forty-two".