813394518 has 8 divisors (see below), whose sum is σ = 1626789048. Its totient is φ = 271131504.

The previous prime is 813394469. The next prime is 813394537. The reversal of 813394518 is 815493318.

It is a sphenic number, since it is the product of 3 distinct primes.

813394518 is an admirable number.

It is a super-2 number, since 2×813394518² = 1323221283824904648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 813394518.

It is a congruent number.

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, 67782871 + ... + 67782882.

It is an arithmetic number, because the mean of its divisors is an integer number (203348631).

Almost surely, 2^813394518 is an apocalyptic number.

813394518 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

813394518 is a wasteful number, since it uses less digits than its factorization.

813394518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135565758.

The product of its digits is 103680, while the sum is 42.

The square root of 813394518 is about 28520.0721948595. The cubic root of 813394518 is about 933.4701044746.

The spelling of 813394518 in words is "eight hundred thirteen million, three hundred ninety-four thousand, five hundred eighteen".