2194840 has 32 divisors (see below), whose sum is σ = 5075280. Its totient is φ = 853632.

The previous prime is 2194811. The next prime is 2194847. The reversal of 2194840 is 484912.

2194840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 2194799 and 2194808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194847) 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 7 ways as a sum of consecutive naturals, for example, 739 + ... + 2221.

2^2194840 is an apocalyptic number.

2194840 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 2194840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2537640).

2194840 is an abundant number, since it is smaller than the sum of its proper divisors (2880440).

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

2194840 is a wasteful number, since it uses less digits than its factorization.

2194840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1531 (or 1527 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 2194840 is about 1481.4992406343. The cubic root of 2194840 is about 129.9573824801.

The spelling of 2194840 in words is "two million, one hundred ninety-four thousand, eight hundred forty".