10891218 has 32 divisors (see below), whose sum is σ = 24696000. Its totient is φ = 3174336.

The previous prime is 10891217. The next prime is 10891241. The reversal of 10891218 is 81219801.

It is not an unprimeable number, because it can be changed into a prime (10891217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2193 + ... + 5156.

It is an arithmetic number, because the mean of its divisors is an integer number (771750).

Almost surely, 2^10891218 is an apocalyptic number.

10891218 is an abundant number, since it is smaller than the sum of its proper divisors (13804782).

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

10891218 is a wasteful number, since it uses less digits than its factorization.

10891218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7386.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 10891218 is about 3300.1845402947. The cubic root of 10891218 is about 221.6624608344.

The spelling of 10891218 in words is "ten million, eight hundred ninety-one thousand, two hundred eighteen".