1918436 has 24 divisors (see below), whose sum is σ = 3669120. Its totient is φ = 872352.

The previous prime is 1918429. The next prime is 1918439. The reversal of 1918436 is 6348191.

It is a happy number.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1918439) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 3875 + ... + 4341.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

2^1918436 is an apocalyptic number.

It is an amenable number.

1918436 is a deficient number, since it is larger than the sum of its proper divisors (1750684).

1918436 is a wasteful number, since it uses less digits than its factorization.

1918436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563 (or 561 counting only the distinct ones).

The product of its digits is 5184, while the sum is 32.

The square root of 1918436 is about 1385.0761711906. The cubic root of 1918436 is about 124.2555430730.

The spelling of 1918436 in words is "one million, nine hundred eighteen thousand, four hundred thirty-six".