3825638447 has 4 divisors (see below), whose sum is σ = 3826012320. Its totient is φ = 3825264576.

The previous prime is 3825638423. The next prime is 3825638449. The reversal of 3825638447 is 7448365283.

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

It is a cyclic number.

It is not a de Polignac number, because 3825638447 - 2²⁰ = 3824589871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3825638395 and 3825638404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3825638449) 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, 171143 + ... + 192200.

It is an arithmetic number, because the mean of its divisors is an integer number (956503080).

Almost surely, 2^3825638447 is an apocalyptic number.

3825638447 is a deficient number, since it is larger than the sum of its proper divisors (373873).

3825638447 is a wasteful number, since it uses less digits than its factorization.

3825638447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373872.

The product of its digits is 3870720, while the sum is 50.

The square root of 3825638447 is about 61851.7457069726. The cubic root of 3825638447 is about 1563.9924100457.

The spelling of 3825638447 in words is "three billion, eight hundred twenty-five million, six hundred thirty-eight thousand, four hundred forty-seven".