1821448396 has 6 divisors (see below), whose sum is σ = 3187534700. Its totient is φ = 910724196.

The previous prime is 1821448381. The next prime is 1821448417. The reversal of 1821448396 is 6938441281.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 227681046 + ... + 227681053.

Almost surely, 2^1821448396 is an apocalyptic number.

It is an amenable number.

1821448396 is a deficient number, since it is larger than the sum of its proper divisors (1366086304).

1821448396 is a wasteful number, since it uses less digits than its factorization.

1821448396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455362103 (or 455362101 counting only the distinct ones).

The product of its digits is 331776, while the sum is 46.

The square root of 1821448396 is about 42678.4301023362. The cubic root of 1821448396 is about 1221.2529446179.

The spelling of 1821448396 in words is "one billion, eight hundred twenty-one million, four hundred forty-eight thousand, three hundred ninety-six".