1812828447 has 24 divisors (see below), whose sum is σ = 2743370240. Its totient is φ = 1152098640.

The previous prime is 1812828419. The next prime is 1812828449. The reversal of 1812828447 is 7448282181.

1812828447 is a `hidden beast` number, since 181 + 2 + 8 + 28 + 447 = 666.

It is not a de Polignac number, because 1812828447 - 2²⁸ = 1544392991 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1812828449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 29797 + ... + 67182.

Almost surely, 2^1812828447 is an apocalyptic number.

1812828447 is a deficient number, since it is larger than the sum of its proper divisors (930541793).

1812828447 is a wasteful number, since it uses less digits than its factorization.

1812828447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97083 (or 97080 counting only the distinct ones).

The product of its digits is 229376, while the sum is 45.

The square root of 1812828447 is about 42577.3231544680. The cubic root of 1812828447 is about 1219.3233834375.

The spelling of 1812828447 in words is "one billion, eight hundred twelve million, eight hundred twenty-eight thousand, four hundred forty-seven".