813140008 has 16 divisors (see below), whose sum is σ = 1525017780. Its totient is φ = 406468608.

The previous prime is 813139967. The next prime is 813140059. The reversal of 813140008 is 800041318.

It can be written as a sum of positive squares in 2 ways, for example, as 812136004 + 1004004 = 28498^2 + 1002^2 .

It is a super-2 number, since 2×813140008² = 1322393345220480128, which contains 22 as substring.

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, 29766 + ... + 50122.

Almost surely, 2^813140008 is an apocalyptic number.

It is an amenable number.

813140008 is a deficient number, since it is larger than the sum of its proper divisors (711877772).

813140008 is a wasteful number, since it uses less digits than its factorization.

813140008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25356 (or 25352 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 813140008 is about 28515.6099005439. The cubic root of 813140008 is about 933.3727338242.

The spelling of 813140008 in words is "eight hundred thirteen million, one hundred forty thousand, eight".