257844742 has 16 divisors (see below), whose sum is σ = 400982400. Its totient is φ = 124203520.

The previous prime is 257844739. The next prime is 257844767. The reversal of 257844742 is 247448752.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23142 + ... + 32422.

It is an arithmetic number, because the mean of its divisors is an integer number (25061400).

Almost surely, 2^257844742 is an apocalyptic number.

257844742 is a deficient number, since it is larger than the sum of its proper divisors (143137658).

257844742 is a wasteful number, since it uses less digits than its factorization.

257844742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9791.

The product of its digits is 501760, while the sum is 43.

The square root of 257844742 is about 16057.5447064612. The cubic root of 257844742 is about 636.4819517808.

The spelling of 257844742 in words is "two hundred fifty-seven million, eight hundred forty-four thousand, seven hundred forty-two".