813472818 has 16 divisors (see below), whose sum is σ = 1629724320. Its totient is φ = 270694496.

The previous prime is 813472813. The next prime is 813472843. The reversal of 813472818 is 818274318.

It is a super-2 number, since 2×813472818² = 1323476051249722248, 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 813472818.

It is not an unprimeable number, because it can be changed into a prime (813472811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111963 + ... + 119006.

It is an arithmetic number, because the mean of its divisors is an integer number (101857770).

Almost surely, 2^813472818 is an apocalyptic number.

813472818 is an abundant number, since it is smaller than the sum of its proper divisors (816251502).

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

813472818 is a wasteful number, since it uses less digits than its factorization.

813472818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231561.

The product of its digits is 86016, while the sum is 42.

The square root of 813472818 is about 28521.4448792483. Note that the first 3 decimals coincide. The cubic root of 813472818 is about 933.5000564690.

The spelling of 813472818 in words is "eight hundred thirteen million, four hundred seventy-two thousand, eight hundred eighteen".