8440216812 has 36 divisors (see below), whose sum is σ = 21337874376. Its totient is φ = 2813025600.

The previous prime is 8440216801. The next prime is 8440216819. The reversal of 8440216812 is 2186120448.

8440216812 is a `hidden beast` number, since 84 + 402 + 168 + 12 = 666.

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

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

It is not an unprimeable number, because it can be changed into a prime (8440216819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 414903 + ... + 434769.

Almost surely, 2^8440216812 is an apocalyptic number.

It is an amenable number.

8440216812 is an abundant number, since it is smaller than the sum of its proper divisors (12897657564).

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

8440216812 is a wasteful number, since it uses less digits than its factorization.

8440216812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31678 (or 31673 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 8440216812 is about 91870.6526155116. The cubic root of 8440216812 is about 2036.0316945492.

The spelling of 8440216812 in words is "eight billion, four hundred forty million, two hundred sixteen thousand, eight hundred twelve".