817363818 has 64 divisors (see below), whose sum is σ = 1872846720. Its totient is φ = 264041856.

The previous prime is 817363817. The next prime is 817363843. The reversal of 817363818 is 818363718.

817363818 is a `hidden beast` number, since 8 + 1 + 7 + 3 + 638 + 1 + 8 = 666.

It is a super-2 number, since 2×817363818² = 1336167221951074248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (817363817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 624721 + ... + 626027.

It is an arithmetic number, because the mean of its divisors is an integer number (29263230).

Almost surely, 2^817363818 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 817363818, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (936423360).

817363818 is an abundant number, since it is smaller than the sum of its proper divisors (1055482902).

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

817363818 is a wasteful number, since it uses less digits than its factorization.

817363818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1668 (or 1662 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 817363818 is about 28589.5753378745. The cubic root of 817363818 is about 934.9860609702.

The spelling of 817363818 in words is "eight hundred seventeen million, three hundred sixty-three thousand, eight hundred eighteen".