8440684416 has 96 divisors (see below), whose sum is σ = 25717770000. Its totient is φ = 2648051712.

The previous prime is 8440684381. The next prime is 8440684471. The reversal of 8440684416 is 6144860448.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×8440684416² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 195916 + ... + 235083.

Almost surely, 2^8440684416 is an apocalyptic number.

It is an amenable number.

8440684416 is an abundant number, since it is smaller than the sum of its proper divisors (17277085584).

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

8440684416 is a wasteful number, since it uses less digits than its factorization.

8440684416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 431036 (or 431021 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 45.

The square root of 8440684416 is about 91873.1974843588. The cubic root of 8440684416 is about 2036.0692938591.

The spelling of 8440684416 in words is "eight billion, four hundred forty million, six hundred eighty-four thousand, four hundred sixteen".