1338606181 has 6 divisors (see below), whose sum is σ = 1471360646. Its totient is φ = 1216914600.

The previous prime is 1338606173. The next prime is 1338606193. The reversal of 1338606181 is 1816068331.

It can be written as a sum of positive squares in only one way, i.e., 1322485956 + 16120225 = 36366^2 + 4015^2 .

It is not a de Polignac number, because 1338606181 - 2³ = 1338606173 is a prime.

It is a super-2 number, since 2×1338606181² = 3583733015622809522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1338606181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338606151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5531310 + ... + 5531551.

Almost surely, 2^1338606181 is an apocalyptic number.

1338606181 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1338606181 is a deficient number, since it is larger than the sum of its proper divisors (132754465).

1338606181 is a wasteful number, since it uses less digits than its factorization.

1338606181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11062883 (or 11062872 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1338606181 is about 36586.9673654431. The cubic root of 1338606181 is about 1102.0913878710.

It can be divided in two parts, 133860 and 6181, that added together give a palindrome (140041).

The spelling of 1338606181 in words is "one billion, three hundred thirty-eight million, six hundred six thousand, one hundred eighty-one".