3919636449 has 27 divisors (see below), whose sum is σ = 5814578809. Its totient is φ = 2544348480.

The previous prime is 3919636447. The next prime is 3919636453. The reversal of 3919636449 is 9446369193.

The square root of 3919636449 is 62607.

It is a perfect power (a square), and thus also a powerful number.

3919636449 is a `hidden beast` number, since 3 + 9 + 196 + 3 + 6 + 449 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 196196049 + 3723440400 = 14007^2 + 61020^2 .

It is not a de Polignac number, because 3919636449 - 2¹ = 3919636447 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3919636395 and 3919636404.

It is not an unprimeable number, because it can be changed into a prime (3919636447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 7700407 + ... + 7700915.

Almost surely, 2^3919636449 is an apocalyptic number.

3919636449 is the 62607-th square number.

3919636449 is the 31304-th centered octagonal number.

It is an amenable number.

3919636449 is a deficient number, since it is larger than the sum of its proper divisors (1894942360).

3919636449 is an frugal number, since it uses more digits than its factorization.

3919636449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 553 counting only the distinct ones).

The product of its digits is 3779136, while the sum is 54.

The cubic root of 3919636449 is about 1576.6982872399.

The spelling of 3919636449 in words is "three billion, nine hundred nineteen million, six hundred thirty-six thousand, four hundred forty-nine".