2243406856 has 8 divisors (see below), whose sum is σ = 4206387870. Its totient is φ = 1121703424.

The previous prime is 2243406827. The next prime is 2243406857. The reversal of 2243406856 is 6586043422.

It can be written as a sum of positive squares in only one way, i.e., 1832696100 + 410710756 = 42810^2 + 20266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (2243406857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140212921 + ... + 140212936.

Almost surely, 2^2243406856 is an apocalyptic number.

It is an amenable number.

2243406856 is a deficient number, since it is larger than the sum of its proper divisors (1962981014).

2243406856 is a wasteful number, since it uses less digits than its factorization.

2243406856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280425863 (or 280425859 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 40.

The square root of 2243406856 is about 47364.6160757163. The cubic root of 2243406856 is about 1309.0895244876.

The spelling of 2243406856 in words is "two billion, two hundred forty-three million, four hundred six thousand, eight hundred fifty-six".