813667738 has 16 divisors (see below), whose sum is σ = 1322170920. Its totient is φ = 375536928.

The previous prime is 813667727. The next prime is 813667741. The reversal of 813667738 is 837766318.

It can be written as a sum of positive squares in 4 ways, for example, as 18258529 + 795409209 = 4273^2 + 28203^2 .

It is a junction number, because it is equal to n+sod(n) for n = 813667691 and 813667700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88195 + ... + 96982.

Almost surely, 2^813667738 is an apocalyptic number.

813667738 is a deficient number, since it is larger than the sum of its proper divisors (508503182).

813667738 is a wasteful number, since it uses less digits than its factorization.

813667738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185218 (or 185192 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 49.

The square root of 813667738 is about 28524.8617525134. The cubic root of 813667738 is about 933.5746106092.

The spelling of 813667738 in words is "eight hundred thirteen million, six hundred sixty-seven thousand, seven hundred thirty-eight".