1218808 has 16 divisors (see below), whose sum is σ = 2317680. Its totient is φ = 600768.

The previous prime is 1218787. The next prime is 1218821. The reversal of 1218808 is 8088121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 460 + ... + 1627.

It is an arithmetic number, because the mean of its divisors is an integer number (144855).

2^1218808 is an apocalyptic number.

It is an amenable number.

1218808 is a deficient number, since it is larger than the sum of its proper divisors (1098872).

1218808 is a wasteful number, since it uses less digits than its factorization.

1218808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2166 (or 2162 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 1218808 is about 1103.9963768056. The cubic root of 1218808 is about 106.8181614717.

The spelling of 1218808 in words is "one million, two hundred eighteen thousand, eight hundred eight".