338821 has 8 divisors (see below), whose sum is σ = 392000. Its totient is φ = 286848.

The previous prime is 338803. The next prime is 338839. The reversal of 338821 is 128833.

It is an interprime number because it is at equal distance from previous prime (338803) and next prime (338839).

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 338821 - 2⁹ = 338309 is a prime.

It is a super-2 number, since 2×338821² = 229599340082, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338851) 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, 430 + ... + 928.

It is an arithmetic number, because the mean of its divisors is an integer number (49000).

2³³⁸⁸²¹ is an apocalyptic number.

It is an amenable number.

338821 is a deficient number, since it is larger than the sum of its proper divisors (53179).

338821 is an equidigital number, since it uses as much as digits as its factorization.

338821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603.

The product of its digits is 1152, while the sum is 25.

The square root of 338821 is about 582.0833273682. The cubic root of 338821 is about 69.7145518588.

The spelling of 338821 in words is "three hundred thirty-eight thousand, eight hundred twenty-one".