2218940 has 12 divisors (see below), whose sum is σ = 4659816. Its totient is φ = 887568.

The previous prime is 2218933. The next prime is 2218943. The reversal of 2218940 is 498122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2218943) 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 3 ways as a sum of consecutive naturals, for example, 55454 + ... + 55493.

It is an arithmetic number, because the mean of its divisors is an integer number (388318).

2^2218940 is an apocalyptic number.

2218940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218940 is an abundant number, since it is smaller than the sum of its proper divisors (2440876).

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

2218940 is a wasteful number, since it uses less digits than its factorization.

2218940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110956 (or 110954 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 2218940 is about 1489.6106873945. The cubic root of 2218940 is about 130.4313090540.

The spelling of 2218940 in words is "two million, two hundred eighteen thousand, nine hundred forty".