338657381 has 8 divisors (see below), whose sum is σ = 341751960. Its totient is φ = 335577088.

The previous prime is 338657369. The next prime is 338657383. The reversal of 338657381 is 183756833.

It can be written as a sum of positive squares in 4 ways, for example, as 300328900 + 38328481 = 17330^2 + 6191^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 338657381 - 2¹⁴ = 338640997 is a prime.

It is a super-2 number, since 2×338657381² = 229377643411558322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338657383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47285 + ... + 53973.

It is an arithmetic number, because the mean of its divisors is an integer number (42718995).

Almost surely, 2^338657381 is an apocalyptic number.

It is an amenable number.

338657381 is a deficient number, since it is larger than the sum of its proper divisors (3094579).

338657381 is a wasteful number, since it uses less digits than its factorization.

338657381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143.

The product of its digits is 362880, while the sum is 44.

The square root of 338657381 is about 18402.6460325683. The cubic root of 338657381 is about 697.0332817244.

The spelling of 338657381 in words is "three hundred thirty-eight million, six hundred fifty-seven thousand, three hundred eighty-one".