816489244 has 12 divisors (see below), whose sum is σ = 1434169800. Its totient is φ = 406726448.

The previous prime is 816489227. The next prime is 816489281. The reversal of 816489244 is 442984618.

It is a junction number, because it is equal to n+sod(n) for n = 816489194 and 816489203.

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, 378334 + ... + 380485.

It is an arithmetic number, because the mean of its divisors is an integer number (119514150).

Almost surely, 2^816489244 is an apocalyptic number.

It is an amenable number.

816489244 is a deficient number, since it is larger than the sum of its proper divisors (617680556).

816489244 is a wasteful number, since it uses less digits than its factorization.

816489244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 759092 (or 759090 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 816489244 is about 28574.2759138355. The cubic root of 816489244 is about 934.6524656138.

The spelling of 816489244 in words is "eight hundred sixteen million, four hundred eighty-nine thousand, two hundred forty-four".