1838385317 has 4 divisors (see below), whose sum is σ = 1838517900. Its totient is φ = 1838252736.

The previous prime is 1838385301. The next prime is 1838385349. The reversal of 1838385317 is 7135838381.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 852990436 + 985394881 = 29206^2 + 31391^2 .

It is a cyclic number.

It is not a de Polignac number, because 1838385317 - 2⁴ = 1838385301 is a prime.

It is a super-2 number, since 2×1838385317² = 6759321147522380978, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1838385617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42692 + ... + 74157.

It is an arithmetic number, because the mean of its divisors is an integer number (459629475).

Almost surely, 2^1838385317 is an apocalyptic number.

It is an amenable number.

1838385317 is a deficient number, since it is larger than the sum of its proper divisors (132583).

1838385317 is a wasteful number, since it uses less digits than its factorization.

1838385317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132582.

The product of its digits is 483840, while the sum is 47.

The square root of 1838385317 is about 42876.3958023526. The cubic root of 1838385317 is about 1225.0265865672.

The spelling of 1838385317 in words is "one billion, eight hundred thirty-eight million, three hundred eighty-five thousand, three hundred seventeen".