3948891 has 8 divisors (see below), whose sum is σ = 5328960. Its totient is φ = 2600712.

The previous prime is 3948887. The next prime is 3948907. The reversal of 3948891 is 1988493.

3948891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 3948891 - 2² = 3948887 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

3948891 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3948821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7681 + ... + 8178.

It is an arithmetic number, because the mean of its divisors is an integer number (666120).

Almost surely, 2^3948891 is an apocalyptic number.

3948891 is a deficient number, since it is larger than the sum of its proper divisors (1380069).

3948891 is a wasteful number, since it uses less digits than its factorization.

3948891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15945.

The product of its digits is 62208, while the sum is 42.

The square root of 3948891 is about 1987.1816726208. The cubic root of 3948891 is about 158.0611177322.

The spelling of 3948891 in words is "three million, nine hundred forty-eight thousand, eight hundred ninety-one".