11990218 has 8 divisors (see below), whose sum is σ = 18150660. Its totient is φ = 5940000.

The previous prime is 11990213. The next prime is 11990227. The reversal of 11990218 is 81209911.

It can be written as a sum of positive squares in 2 ways, for example, as 11377129 + 613089 = 3373^2 + 783^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11990218.

It is not an unprimeable number, because it can be changed into a prime (11990213) 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, 27283 + ... + 27718.

Almost surely, 2^11990218 is an apocalyptic number.

11990218 is a deficient number, since it is larger than the sum of its proper divisors (6160442).

11990218 is a wasteful number, since it uses less digits than its factorization.

11990218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55112.

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 11990218 is about 3462.6894172016. The cubic root of 11990218 is about 228.8806227399.

The spelling of 11990218 in words is "eleven million, nine hundred ninety thousand, two hundred eighteen".