338855857 has 4 divisors (see below), whose sum is σ = 347120676. Its totient is φ = 330591040.

The previous prime is 338855843. The next prime is 338855897. The reversal of 338855857 is 758558833.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 758558833 = 2689 ⋅282097.

It can be written as a sum of positive squares in 2 ways, for example, as 5574321 + 333281536 = 2361^2 + 18256^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338855857 is a prime.

It is a super-2 number, since 2×338855857² = 229646583646408898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338855897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4132348 + ... + 4132429.

It is an arithmetic number, because the mean of its divisors is an integer number (86780169).

Almost surely, 2^338855857 is an apocalyptic number.

It is an amenable number.

338855857 is a deficient number, since it is larger than the sum of its proper divisors (8264819).

338855857 is an equidigital number, since it uses as much as digits as its factorization.

338855857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8264818.

The product of its digits is 4032000, while the sum is 52.

The square root of 338855857 is about 18408.0378367712. The cubic root of 338855857 is about 697.1694245912.

The spelling of 338855857 in words is "three hundred thirty-eight million, eight hundred fifty-five thousand, eight hundred fifty-seven".