338905807 has 4 divisors (see below), whose sum is σ = 339580080. Its totient is φ = 338231536.

The previous prime is 338905781. The next prime is 338905867. The reversal of 338905807 is 708509833.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 708509833 = 17 ⋅41677049.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-338905807 is a prime.

It is a super-2 number, since 2×338905807² = 229714292036642498, 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 (338905867) 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, 336382 + ... + 337387.

It is an arithmetic number, because the mean of its divisors is an integer number (84895020).

Almost surely, 2^338905807 is an apocalyptic number.

338905807 is a deficient number, since it is larger than the sum of its proper divisors (674273).

338905807 is an equidigital number, since it uses as much as digits as its factorization.

338905807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674272.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 338905807 is about 18409.3945310540. The cubic root of 338905807 is about 697.2036789809.

The spelling of 338905807 in words is "three hundred thirty-eight million, nine hundred five thousand, eight hundred seven".