1819844446 has 16 divisors (see below), whose sum is σ = 3128680800. Its totient is φ = 777696480.

The previous prime is 1819844431. The next prime is 1819844447. The reversal of 1819844446 is 6444489181.

It is a self number, because there is not a number n which added to its sum of digits gives 1819844446.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1819844447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 181345 + ... + 191116.

It is an arithmetic number, because the mean of its divisors is an integer number (195542550).

Almost surely, 2^1819844446 is an apocalyptic number.

1819844446 is a deficient number, since it is larger than the sum of its proper divisors (1308836354).

1819844446 is a wasteful number, since it uses less digits than its factorization.

1819844446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372819.

The product of its digits is 884736, while the sum is 49.

The square root of 1819844446 is about 42659.6348554462. The cubic root of 1819844446 is about 1220.8943647973.

The spelling of 1819844446 in words is "one billion, eight hundred nineteen million, eight hundred forty-four thousand, four hundred forty-six".