2194390 has 16 divisors (see below), whose sum is σ = 4309200. Its totient is φ = 797920.

The previous prime is 2194369. The next prime is 2194391. The reversal of 2194390 is 934912.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2194391) 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 7 ways as a sum of consecutive naturals, for example, 9865 + ... + 10084.

It is an arithmetic number, because the mean of its divisors is an integer number (269325).

2^2194390 is an apocalyptic number.

2194390 is a deficient number, since it is larger than the sum of its proper divisors (2114810).

2194390 is a wasteful number, since it uses less digits than its factorization.

2194390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19967.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 2194390 is about 1481.3473596696. The cubic root of 2194390 is about 129.9485003111.

The spelling of 2194390 in words is "two million, one hundred ninety-four thousand, three hundred ninety".