816239456 has 24 divisors (see below), whose sum is σ = 1676841264. Its totient is φ = 390375040.

The previous prime is 816239447. The next prime is 816239467. The reversal of 816239456 is 654932618.

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, 553775 + ... + 555246.

It is an arithmetic number, because the mean of its divisors is an integer number (69868386).

Almost surely, 2^816239456 is an apocalyptic number.

It is an amenable number.

816239456 is an abundant number, since it is smaller than the sum of its proper divisors (860601808).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

816239456 is a wasteful number, since it uses less digits than its factorization.

816239456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109054 (or 1109046 counting only the distinct ones).

The product of its digits is 311040, while the sum is 44.

The square root of 816239456 is about 28569.9047250774. The cubic root of 816239456 is about 934.5571433611.

The spelling of 816239456 in words is "eight hundred sixteen million, two hundred thirty-nine thousand, four hundred fifty-six".