816844742 has 32 divisors (see below), whose sum is σ = 1422668352. Its totient is φ = 344507904.

The previous prime is 816844723. The next prime is 816844811. The reversal of 816844742 is 247448618.

It is a junction number, because it is equal to n+sod(n) for n = 816844693 and 816844702.

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 15 ways as a sum of consecutive naturals, for example, 871298 + ... + 872234.

It is an arithmetic number, because the mean of its divisors is an integer number (44458386).

Almost surely, 2^816844742 is an apocalyptic number.

816844742 is a deficient number, since it is larger than the sum of its proper divisors (605823610).

816844742 is a wasteful number, since it uses less digits than its factorization.

816844742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1872.

The product of its digits is 344064, while the sum is 44.

The square root of 816844742 is about 28580.4958319481. The cubic root of 816844742 is about 934.7880946187.

The spelling of 816844742 in words is "eight hundred sixteen million, eight hundred forty-four thousand, seven hundred forty-two".