1809384452 has 12 divisors (see below), whose sum is σ = 3169177116. Its totient is φ = 903905280.

The previous prime is 1809384449. The next prime is 1809384463. The reversal of 1809384452 is 2544839081.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1559934016 + 249450436 = 39496^2 + 15794^2 .

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, 191549 + ... + 200772.

It is an arithmetic number, because the mean of its divisors is an integer number (264098093).

Almost surely, 2^1809384452 is an apocalyptic number.

It is an amenable number.

1809384452 is a deficient number, since it is larger than the sum of its proper divisors (1359792664).

1809384452 is a wasteful number, since it uses less digits than its factorization.

1809384452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393478 (or 393476 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 44.

The square root of 1809384452 is about 42536.8599217197. The cubic root of 1809384452 is about 1218.5507407853.

The spelling of 1809384452 in words is "one billion, eight hundred nine million, three hundred eighty-four thousand, four hundred fifty-two".