338995381 has 4 divisors (see below), whose sum is σ = 341583264. Its totient is φ = 336407500.

The previous prime is 338995379. The next prime is 338995409. The reversal of 338995381 is 183599833.

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: 183599833 = 9209 ⋅19937.

It is a cyclic number.

It is not a de Polignac number, because 338995381 - 2¹ = 338995379 is a prime.

It is a super-2 number, since 2×338995381² = 229835736678670322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338995301) 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, 1293745 + ... + 1294006.

It is an arithmetic number, because the mean of its divisors is an integer number (85395816).

Almost surely, 2^338995381 is an apocalyptic number.

It is an amenable number.

338995381 is a deficient number, since it is larger than the sum of its proper divisors (2587883).

338995381 is a wasteful number, since it uses less digits than its factorization.

338995381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587882.

The product of its digits is 699840, while the sum is 49.

The square root of 338995381 is about 18411.8272042728. The cubic root of 338995381 is about 697.2650980339.

The spelling of 338995381 in words is "three hundred thirty-eight million, nine hundred ninety-five thousand, three hundred eighty-one".