499999816 has 16 divisors (see below), whose sum is σ = 937737900. Its totient is φ = 249936384.

The previous prime is 499999751. The next prime is 499999831. The reversal of 499999816 is 618999994.

It can be written as a sum of positive squares in 2 ways, for example, as 499343716 + 656100 = 22346^2 + 810^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53200 + ... + 61888.

Almost surely, 2^499999816 is an apocalyptic number.

It is an amenable number.

499999816 is a deficient number, since it is larger than the sum of its proper divisors (437738084).

499999816 is a wasteful number, since it uses less digits than its factorization.

499999816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15888 (or 15884 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 64.

The square root of 499999816 is about 22360.6756606324. The cubic root of 499999816 is about 793.7004286235.

The spelling of 499999816 in words is "four hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred sixteen".