2173994290 has 32 divisors (see below), whose sum is σ = 4226367600. Its totient is φ = 800388864.

The previous prime is 2173994287. The next prime is 2173994327. The reversal of 2173994290 is 924993712.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 361874529 + 1812119761 = 19023^2 + 42569^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2173994290.

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 15 ways as a sum of consecutive naturals, for example, 21412 + ... + 69328.

Almost surely, 2^2173994290 is an apocalyptic number.

2173994290 is a deficient number, since it is larger than the sum of its proper divisors (2052373310).

2173994290 is a wasteful number, since it uses less digits than its factorization.

2173994290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48286.

The product of its (nonzero) digits is 244944, while the sum is 46.

The square root of 2173994290 is about 46626.1116757552. Note that the first 3 decimals coincide. The cubic root of 2173994290 is about 1295.4464534022.

The spelling of 2173994290 in words is "two billion, one hundred seventy-three million, nine hundred ninety-four thousand, two hundred ninety".