2186748394 has 8 divisors (see below), whose sum is σ = 3284390340. Its totient is φ = 1091951616.

The previous prime is 2186748353. The next prime is 2186748397. The reversal of 2186748394 is 4938476812.

It can be written as a sum of positive squares in 2 ways, for example, as 2182104369 + 4644025 = 46713^2 + 2155^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2186748397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 709369 + ... + 712444.

Almost surely, 2^2186748394 is an apocalyptic number.

2186748394 is a deficient number, since it is larger than the sum of its proper divisors (1097641946).

2186748394 is a wasteful number, since it uses less digits than its factorization.

2186748394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422584.

The product of its digits is 2322432, while the sum is 52.

The square root of 2186748394 is about 46762.6816382465. The cubic root of 2186748394 is about 1297.9748337757.

The spelling of 2186748394 in words is "two billion, one hundred eighty-six million, seven hundred forty-eight thousand, three hundred ninety-four".