257115838 has 48 divisors (see below), whose sum is σ = 465393600. Its totient is φ = 106149120.

The previous prime is 257115821. The next prime is 257115839. The reversal of 257115838 is 838511752.

It is a super-2 number, since 2×257115838² = 132217108300884488, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 257115838.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (257115839) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 357243 + ... + 357961.

It is an arithmetic number, because the mean of its divisors is an integer number (9695700).

Almost surely, 2^257115838 is an apocalyptic number.

257115838 is a deficient number, since it is larger than the sum of its proper divisors (208277762).

257115838 is a wasteful number, since it uses less digits than its factorization.

257115838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 865 (or 858 counting only the distinct ones).

The product of its digits is 67200, while the sum is 40.

The square root of 257115838 is about 16034.8320228183. The cubic root of 257115838 is about 635.8816265725.

The spelling of 257115838 in words is "two hundred fifty-seven million, one hundred fifteen thousand, eight hundred thirty-eight".