2190940 has 12 divisors (see below), whose sum is σ = 4601016. Its totient is φ = 876368.

The previous prime is 2190901. The next prime is 2190959. The reversal of 2190940 is 490912.

2190940 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 54754 + ... + 54793.

It is an arithmetic number, because the mean of its divisors is an integer number (383418).

2^2190940 is an apocalyptic number.

2190940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2190940 is an abundant number, since it is smaller than the sum of its proper divisors (2410076).

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

2190940 is a wasteful number, since it uses less digits than its factorization.

2190940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109556 (or 109554 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 2190940 is about 1480.1824211900. The cubic root of 2190940 is about 129.8803633070.

The spelling of 2190940 in words is "two million, one hundred ninety thousand, nine hundred forty".