40007309968 has 40 divisors (see below), whose sum is σ = 79449586776. Its totient is φ = 19504742400.

The previous prime is 40007309963. The next prime is 40007309987. The reversal of 40007309968 is 86990370004.

It can be written as a sum of positive squares in 4 ways, for example, as 116035984 + 39891273984 = 10772^2 + 199728^2 .

It is a super-2 number, since 2×40007309968² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (40007309963) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1212408 + ... + 1244968.

Almost surely, 2^40007309968 is an apocalyptic number.

It is an amenable number.

40007309968 is a deficient number, since it is larger than the sum of its proper divisors (39442276808).

40007309968 is a wasteful number, since it uses less digits than its factorization.

40007309968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34483 (or 34477 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 46.

The spelling of 40007309968 in words is "forty billion, seven million, three hundred nine thousand, nine hundred sixty-eight".