338621 has 4 divisors (see below), whose sum is σ = 340032. Its totient is φ = 337212.

The previous prime is 338609. The next prime is 338659. The reversal of 338621 is 126833.

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: 126833 = 7 ⋅18119.

It is a cyclic number.

It is not a de Polignac number, because 338621 - 2¹⁴ = 322237 is a prime.

It is a super-2 number, since 2×338621² = 229328363282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 338621.

It is not an unprimeable number, because it can be changed into a prime (338321) 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 in 3 ways as a sum of consecutive naturals, for example, 245 + ... + 858.

It is an arithmetic number, because the mean of its divisors is an integer number (85008).

2³³⁸⁶²¹ is an apocalyptic number.

It is an amenable number.

338621 is a deficient number, since it is larger than the sum of its proper divisors (1411).

338621 is a wasteful number, since it uses less digits than its factorization.

338621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410.

The product of its digits is 864, while the sum is 23.

The square root of 338621 is about 581.9115052996. The cubic root of 338621 is about 69.7008320729.

It can be divided in two parts, 338 and 621, that added together give a palindrome (959).

The spelling of 338621 in words is "three hundred thirty-eight thousand, six hundred twenty-one".