3961684 has 12 divisors (see below), whose sum is σ = 6949908. Its totient is φ = 1976000.

The previous prime is 3961669. The next prime is 3961691. The reversal of 3961684 is 4861693.

It can be written as a sum of positive squares in 2 ways, for example, as 685584 + 3276100 = 828^2 + 1810^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1134 + ... + 3034.

It is an arithmetic number, because the mean of its divisors is an integer number (579159).

Almost surely, 2^3961684 is an apocalyptic number.

It is an amenable number.

3961684 is a deficient number, since it is larger than the sum of its proper divisors (2988224).

3961684 is a wasteful number, since it uses less digits than its factorization.

3961684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2426 (or 2424 counting only the distinct ones).

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

The square root of 3961684 is about 1990.3979501597. The cubic root of 3961684 is about 158.2316209781.

Subtracting 3961684 from its reverse (4861693), we obtain a palindrome (900009).

It can be divided in two parts, 396 and 1684, that added together give a triangular number (2080 = T₆₄).

The spelling of 3961684 in words is "three million, nine hundred sixty-one thousand, six hundred eighty-four".