1818904 has 8 divisors (see below), whose sum is σ = 3410460. Its totient is φ = 909448.

The previous prime is 1818871. The next prime is 1818919. The reversal of 1818904 is 4098181.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1818904² = 6616823522432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113674 + ... + 113689.

2^1818904 is an apocalyptic number.

It is an amenable number.

1818904 is a deficient number, since it is larger than the sum of its proper divisors (1591556).

1818904 is a wasteful number, since it uses less digits than its factorization.

1818904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227369 (or 227365 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The square root of 1818904 is about 1348.6674905254. The cubic root of 1818904 is about 122.0684020251.

The spelling of 1818904 in words is "one million, eight hundred eighteen thousand, nine hundred four".