3129684 has 12 divisors (see below), whose sum is σ = 7302624. Its totient is φ = 1043224.

The previous prime is 3129677. The next prime is 3129689. The reversal of 3129684 is 4869213.

3129684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129689) 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 3 ways as a sum of consecutive naturals, for example, 130392 + ... + 130415.

It is an arithmetic number, because the mean of its divisors is an integer number (608552).

Almost surely, 2^3129684 is an apocalyptic number.

It is an amenable number.

3129684 is an abundant number, since it is smaller than the sum of its proper divisors (4172940).

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

3129684 is a wasteful number, since it uses less digits than its factorization.

3129684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260814 (or 260812 counting only the distinct ones).

The product of its digits is 10368, while the sum is 33.

The square root of 3129684 is about 1769.0912921610. The cubic root of 3129684 is about 146.2738963071.

The spelling of 3129684 in words is "three million, one hundred twenty-nine thousand, six hundred eighty-four".