4001684 has 12 divisors (see below), whose sum is σ = 7017024. Its totient is φ = 1996824.

The previous prime is 4001639. The next prime is 4001689. The reversal of 4001684 is 4861004.

It is a happy number.

4001684 is nontrivially palindromic in base 3.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3077 + ... + 4179.

It is an arithmetic number, because the mean of its divisors is an integer number (584752).

Almost surely, 2^4001684 is an apocalyptic number.

It is an amenable number.

4001684 is a deficient number, since it is larger than the sum of its proper divisors (3015340).

4001684 is a wasteful number, since it uses less digits than its factorization.

4001684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2014 (or 2012 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 4001684 is about 2000.4209556991. The cubic root of 4001684 is about 158.7623785995.

Adding to 4001684 its reverse (4861004), we get a palindrome (8862688).

The spelling of 4001684 in words is "four million, one thousand, six hundred eighty-four".