813815896 has 8 divisors (see below), whose sum is σ = 1525904820. Its totient is φ = 406907944.

The previous prime is 813815887. The next prime is 813815921. The reversal of 813815896 is 698518318.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50863486 + ... + 50863501.

Almost surely, 2^813815896 is an apocalyptic number.

It is an amenable number.

813815896 is a deficient number, since it is larger than the sum of its proper divisors (712088924).

813815896 is a wasteful number, since it uses less digits than its factorization.

813815896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101726993 (or 101726989 counting only the distinct ones).

The product of its digits is 414720, while the sum is 49.

The square root of 813815896 is about 28527.4586319917. The cubic root of 813815896 is about 933.6312709823.

The spelling of 813815896 in words is "eight hundred thirteen million, eight hundred fifteen thousand, eight hundred ninety-six".