3838649 has 4 divisors (see below), whose sum is σ = 3842640. Its totient is φ = 3834660.

The previous prime is 3838621. The next prime is 3838657. The reversal of 3838649 is 9468383.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9468383 = 113 ⋅83791.

It is a cyclic number.

It is not a de Polignac number, because 3838649 - 2¹² = 3834553 is a prime.

It is a super-2 number, since 2×3838649² = 29470452290402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3838609) 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, 434 + ... + 2804.

It is an arithmetic number, because the mean of its divisors is an integer number (960660).

Almost surely, 2^3838649 is an apocalyptic number.

It is an amenable number.

3838649 is a deficient number, since it is larger than the sum of its proper divisors (3991).

3838649 is a wasteful number, since it uses less digits than its factorization.

3838649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990.

The product of its digits is 124416, while the sum is 41.

The square root of 3838649 is about 1959.2470492513. The cubic root of 3838649 is about 156.5763389573.

The spelling of 3838649 in words is "three million, eight hundred thirty-eight thousand, six hundred forty-nine".