1918868 has 12 divisors (see below), whose sum is σ = 3837792. Its totient is φ = 822360.

The previous prime is 1918859. The next prime is 1918879. The reversal of 1918868 is 8688191.

1918868 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34238 + ... + 34293.

It is an arithmetic number, because the mean of its divisors is an integer number (319816).

2^1918868 is an apocalyptic number.

It is an amenable number.

1918868 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1918868 is a wasteful number, since it uses less digits than its factorization.

1918868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68542 (or 68540 counting only the distinct ones).

The product of its digits is 27648, while the sum is 41.

The square root of 1918868 is about 1385.2321105143. The cubic root of 1918868 is about 124.2648691362.

The spelling of 1918868 in words is "one million, nine hundred eighteen thousand, eight hundred sixty-eight".