2180738 has 16 divisors (see below), whose sum is σ = 3810240. Its totient is φ = 916656.

The previous prime is 2180723. The next prime is 2180741. The reversal of 2180738 is 8370812.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 728 + ... + 2211.

It is an arithmetic number, because the mean of its divisors is an integer number (238140).

2^2180738 is an apocalyptic number.

2180738 is a deficient number, since it is larger than the sum of its proper divisors (1629502).

2180738 is a wasteful number, since it uses less digits than its factorization.

2180738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 2180738 is about 1476.7322032109. The cubic root of 2180738 is about 129.6784558361.

The spelling of 2180738 in words is "two million, one hundred eighty thousand, seven hundred thirty-eight".