338775309 has 12 divisors (see below), whose sum is σ = 489624252. Its totient is φ = 225720000.

The previous prime is 338775287. The next prime is 338775317. The reversal of 338775309 is 903577833.

338775309 is a `hidden beast` number, since 33 + 87 + 7 + 530 + 9 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 7717284 + 331058025 = 2778^2 + 18195^2 .

It is not a de Polignac number, because 338775309 - 2⁵ = 338775277 is a prime.

It is a super-2 number, since 2×338775309² = 229537419976090962, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338775319) 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, 7209 + ... + 27009.

It is an arithmetic number, because the mean of its divisors is an integer number (40802021).

Almost surely, 2^338775309 is an apocalyptic number.

It is an amenable number.

338775309 is a deficient number, since it is larger than the sum of its proper divisors (150848943).

338775309 is a wasteful number, since it uses less digits than its factorization.

338775309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21708 (or 21705 counting only the distinct ones).

The product of its (nonzero) digits is 476280, while the sum is 45.

The square root of 338775309 is about 18405.8498581293. The cubic root of 338775309 is about 697.1141798101.

The spelling of 338775309 in words is "three hundred thirty-eight million, seven hundred seventy-five thousand, three hundred nine".