338733721 has 12 divisors (see below), whose sum is σ = 361755292. Its totient is φ = 317104128.

The previous prime is 338733701. The next prime is 338733727. The reversal of 338733721 is 127337833.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 50922496 + 287811225 = 7136^2 + 16965^2 .

It is not a de Polignac number, because 338733721 - 2¹⁵ = 338700953 is a prime.

It is a super-2 number, since 2×338733721² = 229481067485011682, which contains 22 as substring.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (338733727) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 52741 + ... + 58813.

Almost surely, 2^338733721 is an apocalyptic number.

It is an amenable number.

338733721 is a deficient number, since it is larger than the sum of its proper divisors (23021571).

338733721 is a wasteful number, since it uses less digits than its factorization.

338733721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6300 (or 6283 counting only the distinct ones).

The product of its digits is 63504, while the sum is 37.

The square root of 338733721 is about 18404.7200739376. The cubic root of 338733721 is about 697.0856527695.

The spelling of 338733721 in words is "three hundred thirty-eight million, seven hundred thirty-three thousand, seven hundred twenty-one".