3891664 has 20 divisors (see below), whose sum is σ = 8617504. Its totient is φ = 1667808.

The previous prime is 3891659. The next prime is 3891673. The reversal of 3891664 is 4661983.

3891664 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 3 ways as a sum of consecutive naturals, for example, 17262 + ... + 17485.

Almost surely, 2^3891664 is an apocalyptic number.

It is an amenable number.

3891664 is an abundant number, since it is smaller than the sum of its proper divisors (4725840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3891664 is a wasteful number, since it uses less digits than its factorization.

3891664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34762 (or 34756 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The square root of 3891664 is about 1972.7300879745. The cubic root of 3891664 is about 157.2938631878.

The spelling of 3891664 in words is "three million, eight hundred ninety-one thousand, six hundred sixty-four".