3881649 has 8 divisors (see below), whose sum is σ = 5229280. Its totient is φ = 2560896.

The previous prime is 3881611. The next prime is 3881659. The reversal of 3881649 is 9461883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3881649 - 2⁸ = 3881393 is a prime.

It is a super-3 number, since 3×3881649³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

3881649 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3881609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6379 + ... + 6960.

It is an arithmetic number, because the mean of its divisors is an integer number (653660).

Almost surely, 2^3881649 is an apocalyptic number.

It is an amenable number.

3881649 is a deficient number, since it is larger than the sum of its proper divisors (1347631).

3881649 is a wasteful number, since it uses less digits than its factorization.

3881649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13439.

The product of its digits is 41472, while the sum is 39.

The square root of 3881649 is about 1970.1900923515. The cubic root of 3881649 is about 157.1588180167.

The spelling of 3881649 in words is "three million, eight hundred eighty-one thousand, six hundred forty-nine".