2218740 has 24 divisors (see below), whose sum is σ = 6212640. Its totient is φ = 591648.

The previous prime is 2218709. The next prime is 2218751. The reversal of 2218740 is 478122.

2218740 = T₄₆₁ + T₄₆₂ + ... + T₄₈₀.

It is a self number, because there is not a number n which added to its sum of digits gives 2218740.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18430 + ... + 18549.

It is an arithmetic number, because the mean of its divisors is an integer number (258860).

2^2218740 is an apocalyptic number.

2218740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2218740 is an abundant number, since it is smaller than the sum of its proper divisors (3993900).

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

2218740 is a wasteful number, since it uses less digits than its factorization.

2218740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36991 (or 36989 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2218740 is about 1489.5435542474. The cubic root of 2218740 is about 130.4273902091.

The spelling of 2218740 in words is "two million, two hundred eighteen thousand, seven hundred forty".