813375236 has 12 divisors (see below), whose sum is σ = 1423629312. Its totient is φ = 406624008.

The previous prime is 813375223. The next prime is 813375247. The reversal of 813375236 is 632573318.

It is a self number, because there is not a number n which added to its sum of digits gives 813375236.

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, 23981 + ... + 46923.

It is an arithmetic number, because the mean of its divisors is an integer number (118635776).

Almost surely, 2^813375236 is an apocalyptic number.

It is an amenable number.

813375236 is a deficient number, since it is larger than the sum of its proper divisors (610254076).

813375236 is a wasteful number, since it uses less digits than its factorization.

813375236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31810 (or 31808 counting only the distinct ones).

The product of its digits is 90720, while the sum is 38.

The square root of 813375236 is about 28519.7341502336. The cubic root of 813375236 is about 933.4627282620.

The spelling of 813375236 in words is "eight hundred thirteen million, three hundred seventy-five thousand, two hundred thirty-six".