3781782819 has 12 divisors (see below), whose sum is σ = 5750079400. Its totient is φ = 2388494304.

The previous prime is 3781782731. The next prime is 3781782827. The reversal of 3781782819 is 9182871873.

It is a happy number.

3781782819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3781782819 - 2¹⁷ = 3781651747 is a prime.

It is a super-2 number, since 2×3781782819² = 28603762580167173522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3781782899) 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, 11057674 + ... + 11058015.

Almost surely, 2^3781782819 is an apocalyptic number.

3781782819 is a deficient number, since it is larger than the sum of its proper divisors (1968296581).

3781782819 is a wasteful number, since it uses less digits than its factorization.

3781782819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22115714 (or 22115711 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 54.

The square root of 3781782819 is about 61496.2016631922. The cubic root of 3781782819 is about 1557.9930935749.

The spelling of 3781782819 in words is "three billion, seven hundred eighty-one million, seven hundred eighty-two thousand, eight hundred nineteen".