4891218 has 32 divisors (see below), whose sum is σ = 10221120. Its totient is φ = 1559040.

The previous prime is 4891217. The next prime is 4891241. The reversal of 4891218 is 8121984.

It is a super-5 number, since 5×4891218⁵ (a number of 35 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (4891213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14346 + ... + 14682.

It is an arithmetic number, because the mean of its divisors is an integer number (319410).

Almost surely, 2^4891218 is an apocalyptic number.

4891218 is an abundant number, since it is smaller than the sum of its proper divisors (5329902).

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

4891218 is a wasteful number, since it uses less digits than its factorization.

4891218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442.

The product of its digits is 4608, while the sum is 33.

The square root of 4891218 is about 2211.6098209223. The cubic root of 4891218 is about 169.7483936562.

The spelling of 4891218 in words is "four million, eight hundred ninety-one thousand, two hundred eighteen".