1836380349 has 8 divisors (see below), whose sum is σ = 2720563520. Its totient is φ = 1224253548.

The previous prime is 1836380339. The next prime is 1836380363. The reversal of 1836380349 is 9430836381.

1836380349 is a `hidden beast` number, since 1 + 8 + 3 + 638 + 0 + 3 + 4 + 9 = 666.

It is not a de Polignac number, because 1836380349 - 2⁴ = 1836380333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1836380339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34007017 + ... + 34007070.

It is an arithmetic number, because the mean of its divisors is an integer number (340070440).

Almost surely, 2^1836380349 is an apocalyptic number.

It is an amenable number.

1836380349 is a deficient number, since it is larger than the sum of its proper divisors (884183171).

1836380349 is an equidigital number, since it uses as much as digits as its factorization.

1836380349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68014096 (or 68014090 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 1836380349 is about 42853.0086341671. The cubic root of 1836380349 is about 1224.5810810243.

The spelling of 1836380349 in words is "one billion, eight hundred thirty-six million, three hundred eighty thousand, three hundred forty-nine".