1918408 has 16 divisors (see below), whose sum is σ = 3721500. Its totient is φ = 926016.

The previous prime is 1918391. The next prime is 1918417. The reversal of 1918408 is 8048191.

It can be written as a sum of positive squares in 2 ways, for example, as 1790244 + 128164 = 1338^2 + 358^2 .

It is a super-3 number, since 3×1918408³ = 21180889044233319936, which contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1918408.

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, 3903 + ... + 4366.

2^1918408 is an apocalyptic number.

It is an amenable number.

1918408 is a deficient number, since it is larger than the sum of its proper divisors (1803092).

1918408 is a wasteful number, since it uses less digits than its factorization.

1918408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8304 (or 8300 counting only the distinct ones).

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

The square root of 1918408 is about 1385.0660634064. The cubic root of 1918408 is about 124.2549385576.

The spelling of 1918408 in words is "one million, nine hundred eighteen thousand, four hundred eight".