1838513691 has 48 divisors (see below), whose sum is σ = 3095339520. Its totient is φ = 1029801600.

The previous prime is 1838513681. The next prime is 1838513713. The reversal of 1838513691 is 1963158381.

It is a happy number.

1838513691 is a `hidden beast` number, since 18 + 38 + 513 + 6 + 91 = 666.

It is not a de Polignac number, because 1838513691 - 2¹⁴ = 1838497307 is a prime.

It is a super-3 number, since 3×1838513691³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1838513681) 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 47 ways as a sum of consecutive naturals, for example, 2233506 + ... + 2234328.

It is an arithmetic number, because the mean of its divisors is an integer number (64486240).

Almost surely, 2^1838513691 is an apocalyptic number.

1838513691 is a deficient number, since it is larger than the sum of its proper divisors (1256825829).

1838513691 is a wasteful number, since it uses less digits than its factorization.

1838513691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1496 (or 1493 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1838513691 is about 42877.8928003697. The cubic root of 1838513691 is about 1225.0551003398.

The spelling of 1838513691 in words is "one billion, eight hundred thirty-eight million, five hundred thirteen thousand, six hundred ninety-one".