8999940005 has 12 divisors (see below), whose sum is σ = 12563181900. Its totient is φ = 6171387264.

The previous prime is 8999939957. The next prime is 8999940071. The reversal of 8999940005 is 5000499998.

It can be written as a sum of positive squares in 2 ways, for example, as 6084156001 + 2915784004 = 78001^2 + 53998^2 .

It is not a de Polignac number, because 8999940005 - 2²⁴ = 8983162789 is a prime.

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, 18366980 + ... + 18367469.

It is an arithmetic number, because the mean of its divisors is an integer number (1046931825).

Almost surely, 2^8999940005 is an apocalyptic number.

It is an amenable number.

8999940005 is a deficient number, since it is larger than the sum of its proper divisors (3563241895).

8999940005 is a wasteful number, since it uses less digits than its factorization.

8999940005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36734468 (or 36734461 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 53.

The square root of 8999940005 is about 94868.0136031107. The cubic root of 8999940005 is about 2080.0792010183.

The spelling of 8999940005 in words is "eight billion, nine hundred ninety-nine million, nine hundred forty thousand, five".