1812898449 has 16 divisors (see below), whose sum is σ = 2687256000. Its totient is φ = 1207932768.

The previous prime is 1812898427. The next prime is 1812898459. The reversal of 1812898449 is 9448982181.

It is a happy number.

It is not a de Polignac number, because 1812898449 - 2⁸ = 1812898193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1812898395 and 1812898404.

It is not an unprimeable number, because it can be changed into a prime (1812898459) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 34102 + ... + 69200.

It is an arithmetic number, because the mean of its divisors is an integer number (167953500).

Almost surely, 2^1812898449 is an apocalyptic number.

It is an amenable number.

1812898449 is a deficient number, since it is larger than the sum of its proper divisors (874357551).

1812898449 is a wasteful number, since it uses less digits than its factorization.

1812898449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37021 (or 37015 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 54.

The square root of 1812898449 is about 42578.1452038484. The cubic root of 1812898449 is about 1219.3390778766.

The spelling of 1812898449 in words is "one billion, eight hundred twelve million, eight hundred ninety-eight thousand, four hundred forty-nine".