816449 has 8 divisors (see below), whose sum is σ = 870240. Its totient is φ = 763776.

The previous prime is 816443. The next prime is 816451. The reversal of 816449 is 944618.

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

It is a cyclic number.

It is not a de Polignac number, because 816449 - 2¹² = 812353 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (816443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1622 + ... + 2064.

It is an arithmetic number, because the mean of its divisors is an integer number (108780).

2⁸¹⁶⁴⁴⁹ is an apocalyptic number.

It is an amenable number.

816449 is a deficient number, since it is larger than the sum of its proper divisors (53791).

816449 is a wasteful number, since it uses less digits than its factorization.

816449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559.

The product of its digits is 6912, while the sum is 32.

The square root of 816449 is about 903.5756747500. The cubic root of 816449 is about 93.4637109310.

The spelling of 816449 in words is "eight hundred sixteen thousand, four hundred forty-nine".