2180684 has 24 divisors (see below), whose sum is σ = 4309200. Its totient is φ = 956480.

The previous prime is 2180683. The next prime is 2180693. The reversal of 2180684 is 4860812.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (2180681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 422 + ... + 2130.

It is an arithmetic number, because the mean of its divisors is an integer number (179550).

2^2180684 is an apocalyptic number.

It is an amenable number.

2180684 is a deficient number, since it is larger than the sum of its proper divisors (2128516).

2180684 is a wasteful number, since it uses less digits than its factorization.

2180684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753 (or 1751 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 2180684 is about 1476.7139194847. The cubic root of 2180684 is about 129.6773854501.

The spelling of 2180684 in words is "two million, one hundred eighty thousand, six hundred eighty-four".