268435457 has 4 divisors (see below), whose sum is σ = 284225796. Its totient is φ = 252645120.

The previous prime is 268435399. The next prime is 268435459. The reversal of 268435457 is 754534862.

268435457 is nontrivially palindromic in base 2, base 4 and base 16.

It is a Cunningham number, because it is equal to 2²⁸+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 208975936 + 59459521 = 14456^2 + 7711^2 .

It is a cyclic number.

It is not a de Polignac number, because 268435457 - 2¹⁶ = 268369921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (268435459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (2) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7895144 + ... + 7895177.

It is an arithmetic number, because the mean of its divisors is an integer number (71056449).

It is a Proth number, since it is equal to 1 ⋅ 2²⁸ + 1 and 1 < 2²⁸.

Almost surely, 2^268435457 is an apocalyptic number.

It is an amenable number.

268435457 is a deficient number, since it is larger than the sum of its proper divisors (15790339).

268435457 is a wasteful number, since it uses less digits than its factorization.

268435457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15790338.

The product of its digits is 806400, while the sum is 44.

The square root of 268435457 is about 16384.0000305176. Note that the first 4 decimals coincide. The cubic root of 268435457 is about 645.0795783472.

The spelling of 268435457 in words is "two hundred sixty-eight million, four hundred thirty-five thousand, four hundred fifty-seven".