257063486 has 8 divisors (see below), whose sum is σ = 389339184. Its totient is φ = 127283760.

The previous prime is 257063467. The next prime is 257063497. The reversal of 257063486 is 684360752.

It is a happy number.

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

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, 623735 + ... + 624146.

It is an arithmetic number, because the mean of its divisors is an integer number (48667398).

Almost surely, 2^257063486 is an apocalyptic number.

257063486 is a deficient number, since it is larger than the sum of its proper divisors (132275698).

257063486 is a wasteful number, since it uses less digits than its factorization.

257063486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1247986.

The product of its (nonzero) digits is 241920, while the sum is 41.

The square root of 257063486 is about 16033.1994935509. The cubic root of 257063486 is about 635.8384658260.

It can be divided in two parts, 25706 and 3486, that added together give a palindrome (29192).

The spelling of 257063486 in words is "two hundred fifty-seven million, sixty-three thousand, four hundred eighty-six".