338418261 has 12 divisors (see below), whose sum is σ = 490963980. Its totient is φ = 224625600.

The previous prime is 338418259. The next prime is 338418271. The reversal of 338418261 is 162814833.

338418261 is a `hidden beast` number, since 3 + 384 + 18 + 261 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 236206161 + 102212100 = 15369^2 + 10110^2 .

It is not a de Polignac number, because 338418261 - 2¹ = 338418259 is a prime.

It is a super-2 number, since 2×338418261² = 229053838756528242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (338418221) 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, 80040 + ... + 84161.

It is an arithmetic number, because the mean of its divisors is an integer number (40913665).

Almost surely, 2^338418261 is an apocalyptic number.

It is an amenable number.

338418261 is a deficient number, since it is larger than the sum of its proper divisors (152545719).

338418261 is a wasteful number, since it uses less digits than its factorization.

338418261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164436 (or 164433 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 338418261 is about 18396.1479935339. The cubic root of 338418261 is about 696.8691887978.

The spelling of 338418261 in words is "three hundred thirty-eight million, four hundred eighteen thousand, two hundred sixty-one".