1819966 has 8 divisors (see below), whose sum is σ = 2746800. Its totient is φ = 904368.

The previous prime is 1819957. The next prime is 1819999. The reversal of 1819966 is 6699181.

1819966 is nontrivially palindromic in base 8.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 2391 + ... + 3058.

It is an arithmetic number, because the mean of its divisors is an integer number (343350).

2^1819966 is an apocalyptic number.

1819966 is a deficient number, since it is larger than the sum of its proper divisors (926834).

1819966 is a wasteful number, since it uses less digits than its factorization.

1819966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618.

The product of its digits is 23328, while the sum is 40.

The square root of 1819966 is about 1349.0611550260. The cubic root of 1819966 is about 122.0921546844.

The spelling of 1819966 in words is "one million, eight hundred nineteen thousand, nine hundred sixty-six".