2194194890 has 8 divisors (see below), whose sum is σ = 3949550820. Its totient is φ = 877677952.

The previous prime is 2194194883. The next prime is 2194194907. The reversal of 2194194890 is 984914912.

It can be written as a sum of positive squares in 2 ways, for example, as 2039515921 + 154678969 = 45161^2 + 12437^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2194194890² = 9628982430604224200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109709735 + ... + 109709754.

Almost surely, 2^2194194890 is an apocalyptic number.

2194194890 is a deficient number, since it is larger than the sum of its proper divisors (1755355930).

2194194890 is a wasteful number, since it uses less digits than its factorization.

2194194890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219419496.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 2194194890 is about 46842.2340415143. The cubic root of 2194194890 is about 1299.4464882260.

The spelling of 2194194890 in words is "two billion, one hundred ninety-four million, one hundred ninety-four thousand, eight hundred ninety".