29440138512 has 80 divisors (see below), whose sum is σ = 78760459008. Its totient is φ = 9469622400.

The previous prime is 29440138463. The next prime is 29440138513. The reversal of 29440138512 is 21583104492.

It is not an unprimeable number, because it can be changed into a prime (29440138513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85387 + ... + 257237.

Almost surely, 2^29440138512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29440138512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39380229504).

29440138512 is an abundant number, since it is smaller than the sum of its proper divisors (49320320496).

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

29440138512 is a wasteful number, since it uses less digits than its factorization.

29440138512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171988 (or 171982 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 29440138512 in words is "twenty-nine billion, four hundred forty million, one hundred thirty-eight thousand, five hundred twelve".