3891684 has 48 divisors (see below), whose sum is σ = 9616320. Its totient is φ = 1223040.

The previous prime is 3891683. The next prime is 3891689. The reversal of 3891684 is 4861983.

It is a super-5 number, since 5×3891684⁵ (a number of 34 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (3891683) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18339 + ... + 18549.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

Almost surely, 2^3891684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3891684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4808160).

3891684 is an abundant number, since it is smaller than the sum of its proper divisors (5724636).

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

3891684 is a wasteful number, since it uses less digits than its factorization.

3891684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 298 counting only the distinct ones).

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

The square root of 3891684 is about 1972.7351570852. The cubic root of 3891684 is about 157.2941326417.

Subtracting 3891684 from its reverse (4861983), we obtain a cube (970299 = 99³).

The spelling of 3891684 in words is "three million, eight hundred ninety-one thousand, six hundred eighty-four".