3123684 has 60 divisors (see below), whose sum is σ = 8456448. Its totient is φ = 1004400.

The previous prime is 3123683. The next prime is 3123689. The reversal of 3123684 is 4863213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9889 + ... + 10199.

Almost surely, 2^3123684 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 3123684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4228224).

3123684 is an abundant number, since it is smaller than the sum of its proper divisors (5332764).

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

3123684 is a wasteful number, since it uses less digits than its factorization.

3123684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 347 counting only the distinct ones).

The product of its digits is 3456, while the sum is 27.

The square root of 3123684 is about 1767.3946927611. The cubic root of 3123684 is about 146.1803613233.

Adding to 3123684 its reverse (4863213), we get a palindrome (7986897).

The spelling of 3123684 in words is "three million, one hundred twenty-three thousand, six hundred eighty-four".