8040440172 has 12 divisors (see below), whose sum is σ = 18761027096. Its totient is φ = 2680146720.

The previous prime is 8040440171. The next prime is 8040440179. The reversal of 8040440172 is 2710440408.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×8040440172² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8040440171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335018329 + ... + 335018352.

Almost surely, 2^8040440172 is an apocalyptic number.

It is an amenable number.

8040440172 is an abundant number, since it is smaller than the sum of its proper divisors (10720586924).

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

8040440172 is a wasteful number, since it uses less digits than its factorization.

8040440172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 670036688 (or 670036686 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 30.

The square root of 8040440172 is about 89668.5015599123. The cubic root of 8040440172 is about 2003.3643517287.

The spelling of 8040440172 in words is "eight billion, forty million, four hundred forty thousand, one hundred seventy-two".