813810536 has 64 divisors (see below), whose sum is σ = 2014346880. Its totient is φ = 298414080.

The previous prime is 813810533. The next prime is 813810559. The reversal of 813810536 is 635018318.

It is a junction number, because it is equal to n+sod(n) for n = 813810496 and 813810505.

It is not an unprimeable number, because it can be changed into a prime (813810533) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 28385 + ... + 49328.

It is an arithmetic number, because the mean of its divisors is an integer number (31474170).

Almost surely, 2^813810536 is an apocalyptic number.

It is an amenable number.

813810536 is an abundant number, since it is smaller than the sum of its proper divisors (1200536344).

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

813810536 is a wasteful number, since it uses less digits than its factorization.

813810536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77754 (or 77750 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 813810536 is about 28527.3646872612. The cubic root of 813810536 is about 933.6292212662.

The spelling of 813810536 in words is "eight hundred thirteen million, eight hundred ten thousand, five hundred thirty-six".