257011740 has 36 divisors (see below), whose sum is σ = 779602824. Its totient is φ = 68536416.

The previous prime is 257011723. The next prime is 257011751. The reversal of 257011740 is 47110752.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 713742 + ... + 714101.

It is an arithmetic number, because the mean of its divisors is an integer number (21655634).

Almost surely, 2^257011740 is an apocalyptic number.

257011740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

257011740 is an abundant number, since it is smaller than the sum of its proper divisors (522591084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

257011740 is a wasteful number, since it uses less digits than its factorization.

257011740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1427858 (or 1427853 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 257011740 is about 16031.5856982396. The cubic root of 257011740 is about 635.7957989272.

The spelling of 257011740 in words is "two hundred fifty-seven million, eleven thousand, seven hundred forty".