2851218 has 48 divisors (see below), whose sum is σ = 6604416. Its totient is φ = 887040.

The previous prime is 2851187. The next prime is 2851231. The reversal of 2851218 is 8121582.

It is a super-4 number, since 4×2851218⁴ (a number of 27 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2851191 and 2851200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29346 + ... + 29442.

It is an arithmetic number, because the mean of its divisors is an integer number (137592).

2^2851218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2851218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302208).

2851218 is an abundant number, since it is smaller than the sum of its proper divisors (3753198).

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

2851218 is a wasteful number, since it uses less digits than its factorization.

2851218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199 (or 196 counting only the distinct ones).

The product of its digits is 1280, while the sum is 27.

The square root of 2851218 is about 1688.5550035459. Note that the first 3 decimals coincide. The cubic root of 2851218 is about 141.8001884559.

The spelling of 2851218 in words is "two million, eight hundred fifty-one thousand, two hundred eighteen".