2923218 has 48 divisors (see below), whose sum is σ = 6899256. Its totient is φ = 890880.

The previous prime is 2923213. The next prime is 2923247. The reversal of 2923218 is 8123292.

It is a happy number.

2923218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1750329 + 1172889 = 1323^2 + 1083^2 .

It is an alternating number because its digits alternate between even and odd.

It is a junction number, because it is equal to n+sod(n) for n = 2923191 and 2923200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2923211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12430 + ... + 12662.

2^2923218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2923218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3449628).

2923218 is an abundant number, since it is smaller than the sum of its proper divisors (3976038).

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

2923218 is a wasteful number, since it uses less digits than its factorization.

2923218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299 (or 296 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2923218 is about 1709.7420858129. The cubic root of 2923218 is about 142.9838767744.

The spelling of 2923218 in words is "two million, nine hundred twenty-three thousand, two hundred eighteen".