9381818 has 8 divisors (see below), whose sum is σ = 14114100. Its totient is φ = 4677120.

The previous prime is 9381817. The next prime is 9381821. The reversal of 9381818 is 8181839.

It can be written as a sum of positive squares in 2 ways, for example, as 9320809 + 61009 = 3053^2 + 247^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

9381818 is a modest number, since divided by 1818 gives 938 as remainder.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (9381817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6023 + ... + 7418.

Almost surely, 2^9381818 is an apocalyptic number.

9381818 is a deficient number, since it is larger than the sum of its proper divisors (4732282).

9381818 is a wasteful number, since it uses less digits than its factorization.

9381818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13792.

The product of its digits is 13824, while the sum is 38.

The square root of 9381818 is about 3062.9753508639. The cubic root of 9381818 is about 210.9092697072.

The spelling of 9381818 in words is "nine million, three hundred eighty-one thousand, eight hundred eighteen".