2190994 has 16 divisors (see below), whose sum is σ = 3748248. Its totient is φ = 951552.

The previous prime is 2190983. The next prime is 2190997. The reversal of 2190994 is 4990912.

It can be written as a sum of positive squares in 4 ways, for example, as 2059225 + 131769 = 1435^2 + 363^2 .

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (2190997) 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, 2037 + ... + 2920.

2^2190994 is an apocalyptic number.

2190994 is a deficient number, since it is larger than the sum of its proper divisors (1557254).

2190994 is a wasteful number, since it uses less digits than its factorization.

2190994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4989.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 2190994 is about 1480.2006620725. The cubic root of 2190994 is about 129.8814303501.

The spelling of 2190994 in words is "two million, one hundred ninety thousand, nine hundred ninety-four".