818734212 has 36 divisors (see below), whose sum is σ = 2191319676. Its totient is φ = 256857600.

The previous prime is 818734199. The next prime is 818734283. The reversal of 818734212 is 212437818.

It can be written as a sum of positive squares in 2 ways, for example, as 319479876 + 499254336 = 17874^2 + 22344^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 668289 + ... + 669512.

It is an arithmetic number, because the mean of its divisors is an integer number (60869991).

Almost surely, 2^818734212 is an apocalyptic number.

It is an amenable number.

818734212 is an abundant number, since it is smaller than the sum of its proper divisors (1372585464).

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

818734212 is a wasteful number, since it uses less digits than its factorization.

818734212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1337828 (or 1337823 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 818734212 is about 28613.5319735261. The cubic root of 818734212 is about 935.5083024534.

The spelling of 818734212 in words is "eight hundred eighteen million, seven hundred thirty-four thousand, two hundred twelve".