818837946 has 48 divisors (see below), whose sum is σ = 1977393600. Its totient is φ = 243368064.

The previous prime is 818837933. The next prime is 818837947. The reversal of 818837946 is 649738818.

It is a junction number, because it is equal to n+sod(n) for n = 818837892 and 818837901.

It is not an unprimeable number, because it can be changed into a prime (818837947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64606 + ... + 76233.

It is an arithmetic number, because the mean of its divisors is an integer number (41195700).

Almost surely, 2^818837946 is an apocalyptic number.

818837946 is an abundant number, since it is smaller than the sum of its proper divisors (1158555654).

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

818837946 is a wasteful number, since it uses less digits than its factorization.

818837946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140883 (or 140880 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 818837946 is about 28615.3445899224. The cubic root of 818837946 is about 935.5478105618.

The spelling of 818837946 in words is "eight hundred eighteen million, eight hundred thirty-seven thousand, nine hundred forty-six".