3891398 has 16 divisors (see below), whose sum is σ = 6704640. Its totient is φ = 1659336.

The previous prime is 3891389. The next prime is 3891403. The reversal of 3891398 is 8931983.

3891398 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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, 2765 + ... + 3927.

It is an arithmetic number, because the mean of its divisors is an integer number (419040).

Almost surely, 2^3891398 is an apocalyptic number.

3891398 is a deficient number, since it is larger than the sum of its proper divisors (2813242).

3891398 is a wasteful number, since it uses less digits than its factorization.

3891398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411.

The product of its digits is 46656, while the sum is 41.

The square root of 3891398 is about 1972.6626675638. The cubic root of 3891398 is about 157.2902793634.

The spelling of 3891398 in words is "three million, eight hundred ninety-one thousand, three hundred ninety-eight".