338071721 has 8 divisors (see below), whose sum is σ = 364588224. Its totient is φ = 311628240.

The previous prime is 338071717. The next prime is 338071729. The reversal of 338071721 is 127170833.

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 338071721 - 2² = 338071717 is a prime.

It is a super-2 number, since 2×338071721² = 228584977079803682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (338071729) 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 7 ways as a sum of consecutive naturals, for example, 8435 + ... + 27336.

It is an arithmetic number, because the mean of its divisors is an integer number (45573528).

Almost surely, 2^338071721 is an apocalyptic number.

It is an amenable number.

338071721 is a deficient number, since it is larger than the sum of its proper divisors (26516503).

338071721 is a wasteful number, since it uses less digits than its factorization.

338071721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36511.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 338071721 is about 18386.7267614440. The cubic root of 338071721 is about 696.6312430828.

The spelling of 338071721 in words is "three hundred thirty-eight million, seventy-one thousand, seven hundred twenty-one".