2196440 has 32 divisors (see below), whose sum is σ = 5060880. Its totient is φ = 857472.

The previous prime is 2196433. The next prime is 2196449. The reversal of 2196440 is 446912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2196449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1082 + ... + 2358.

2^2196440 is an apocalyptic number.

2196440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2196440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2530440).

2196440 is an abundant number, since it is smaller than the sum of its proper divisors (2864440).

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

2196440 is a wasteful number, since it uses less digits than its factorization.

2196440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 2196440 is about 1482.0391357856. The cubic root of 2196440 is about 129.9889536965.

It can be divided in two parts, 219 and 6440, that multiplied together give a triangular number (1410360 = T₁₆₇₉).

The spelling of 2196440 in words is "two million, one hundred ninety-six thousand, four hundred forty".