2117804 has 24 divisors (see below), whose sum is σ = 4033680. Its totient is φ = 967104.

The previous prime is 2117777. The next prime is 2117813. The reversal of 2117804 is 4087112.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2117804.

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, 7082 + ... + 7374.

It is an arithmetic number, because the mean of its divisors is an integer number (168070).

2^2117804 is an apocalyptic number.

It is an amenable number.

2117804 is a deficient number, since it is larger than the sum of its proper divisors (1915876).

2117804 is a wasteful number, since it uses less digits than its factorization.

2117804 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449 (or 447 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 23.

The square root of 2117804 is about 1455.2676729729. The cubic root of 2117804 is about 128.4187942973.

The spelling of 2117804 in words is "two million, one hundred seventeen thousand, eight hundred four".