819019818 has 48 divisors (see below), whose sum is σ = 1791144576. Its totient is φ = 270466560.

The previous prime is 819019793. The next prime is 819019823. The reversal of 819019818 is 818910918.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1497021 + ... + 1497567.

It is an arithmetic number, because the mean of its divisors is an integer number (37315512).

Almost surely, 2^819019818 is an apocalyptic number.

819019818 is an abundant number, since it is smaller than the sum of its proper divisors (972124758).

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

819019818 is a wasteful number, since it uses less digits than its factorization.

819019818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The square root of 819019818 is about 28618.5222888954. The cubic root of 819019818 is about 935.6170702391.

Subtracting from 819019818 its reverse (818910918), we obtain a square (108900 = 330²).

It can be divided in two parts, 81901 and 9818, that added together give a palindrome (91719).

The spelling of 819019818 in words is "eight hundred nineteen million, nineteen thousand, eight hundred eighteen".