3889749 has 4 divisors (see below), whose sum is σ = 5186336. Its totient is φ = 2593164.

The previous prime is 3889733. The next prime is 3889759. The reversal of 3889749 is 9479883.

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.

It is not a de Polignac number, because 3889749 - 2⁴ = 3889733 is a prime.

It is a D-number.

It is a Duffinian number.

3889749 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3889698 and 3889707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3889729) 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 3 ways as a sum of consecutive naturals, for example, 648289 + ... + 648294.

It is an arithmetic number, because the mean of its divisors is an integer number (1296584).

Almost surely, 2^3889749 is an apocalyptic number.

It is an amenable number.

3889749 is a deficient number, since it is larger than the sum of its proper divisors (1296587).

3889749 is a wasteful number, since it uses less digits than its factorization.

3889749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296586.

The product of its digits is 435456, while the sum is 48.

The square root of 3889749 is about 1972.2446602792. The cubic root of 3889749 is about 157.2680587017.

The spelling of 3889749 in words is "three million, eight hundred eighty-nine thousand, seven hundred forty-nine".