338138401 has 4 divisors (see below), whose sum is σ = 338180400. Its totient is φ = 338096404.

The previous prime is 338138329. The next prime is 338138441. The reversal of 338138401 is 104831833.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104831833 = 131 ⋅800243.

It is a cyclic number.

It is not a de Polignac number, because 338138401 - 2²³ = 329749793 is a prime.

It is a super-2 number, since 2×338138401² = 228675156461673602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338138441) 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, 4711 + ... + 26428.

It is an arithmetic number, because the mean of its divisors is an integer number (84545100).

Almost surely, 2^338138401 is an apocalyptic number.

It is an amenable number.

338138401 is a deficient number, since it is larger than the sum of its proper divisors (41999).

338138401 is a wasteful number, since it uses less digits than its factorization.

338138401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41998.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 338138401 is about 18388.5399366018. The cubic root of 338138401 is about 696.6770403844.

The spelling of 338138401 in words is "three hundred thirty-eight million, one hundred thirty-eight thousand, four hundred one".