338680257 has 4 divisors (see below), whose sum is σ = 451573680. Its totient is φ = 225786836.

The previous prime is 338680219. The next prime is 338680271. The reversal of 338680257 is 752086833.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 752086833 = 3 ⋅250695611.

It is a cyclic number.

It is not a de Polignac number, because 338680257 - 2²⁷ = 204462529 is a prime.

It is a super-2 number, since 2×338680257² = 229408632963172098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338680217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56446707 + ... + 56446712.

It is an arithmetic number, because the mean of its divisors is an integer number (112893420).

Almost surely, 2^338680257 is an apocalyptic number.

It is an amenable number.

338680257 is a deficient number, since it is larger than the sum of its proper divisors (112893423).

338680257 is a wasteful number, since it uses less digits than its factorization.

338680257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112893422.

The product of its (nonzero) digits is 241920, while the sum is 42.

The square root of 338680257 is about 18403.2675631258. The cubic root of 338680257 is about 697.0489760271.

The spelling of 338680257 in words is "three hundred thirty-eight million, six hundred eighty thousand, two hundred fifty-seven".