338430857 has 2 divisors, whose sum is σ = 338430858. Its totient is φ = 338430856.

The previous prime is 338430853. The next prime is 338430863. The reversal of 338430857 is 758034833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 327646201 + 10784656 = 18101^2 + 3284^2 .

It is an emirp because it is prime and its reverse (758034833) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 338430857 - 2² = 338430853 is a prime.

It is a super-2 number, since 2×338430857² = 229070889939508898, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (338430853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169215428 + 169215429.

It is an arithmetic number, because the mean of its divisors is an integer number (169215429).

Almost surely, 2^338430857 is an apocalyptic number.

It is an amenable number.

338430857 is a deficient number, since it is larger than the sum of its proper divisors (1).

338430857 is an equidigital number, since it uses as much as digits as its factorization.

338430857 is an odious number, because the sum of its binary digits is odd.

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

The square root of 338430857 is about 18396.4903446282. The cubic root of 338430857 is about 696.8778345639.

The spelling of 338430857 in words is "three hundred thirty-eight million, four hundred thirty thousand, eight hundred fifty-seven".