338828821 has 2 divisors, whose sum is σ = 338828822. Its totient is φ = 338828820.

The previous prime is 338828807. The next prime is 338828851. The reversal of 338828821 is 128828833.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 305026225 + 33802596 = 17465^2 + 5814^2 .

It is a cyclic number.

It is not a de Polignac number, because 338828821 - 2¹⁵ = 338796053 is a prime.

It is a super-2 number, since 2×338828821² = 229609939880500082, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (338828851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 169414410 + 169414411.

It is an arithmetic number, because the mean of its divisors is an integer number (169414411).

Almost surely, 2^338828821 is an apocalyptic number.

It is an amenable number.

338828821 is a deficient number, since it is larger than the sum of its proper divisors (1).

338828821 is an equidigital number, since it uses as much as digits as its factorization.

338828821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 147456, while the sum is 43.

The square root of 338828821 is about 18407.3034690038. The cubic root of 338828821 is about 697.1508826128.

The spelling of 338828821 in words is "three hundred thirty-eight million, eight hundred twenty-eight thousand, eight hundred twenty-one".