257081336 has 16 divisors (see below), whose sum is σ = 483375600. Its totient is φ = 128181184.

The previous prime is 257081329. The next prime is 257081339. The reversal of 257081336 is 633180752.

It is a junction number, because it is equal to n+sod(n) for n = 257081296 and 257081305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257081339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41885 + ... + 47628.

It is an arithmetic number, because the mean of its divisors is an integer number (30210975).

Almost surely, 2^257081336 is an apocalyptic number.

It is an amenable number.

257081336 is a deficient number, since it is larger than the sum of its proper divisors (226294264).

257081336 is a wasteful number, since it uses less digits than its factorization.

257081336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89878 (or 89874 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 257081336 is about 16033.7561413413. The cubic root of 257081336 is about 635.8531826236.

The spelling of 257081336 in words is "two hundred fifty-seven million, eighty-one thousand, three hundred thirty-six".