29720086188 has 96 divisors (see below), whose sum is σ = 79185931776. Its totient is φ = 8594568192.

The previous prime is 29720086183. The next prime is 29720086189. The reversal of 29720086188 is 88168002792.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 29720086188.

It is not an unprimeable number, because it can be changed into a prime (29720086183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1962895 + ... + 1977977.

It is an arithmetic number, because the mean of its divisors is an integer number (824853456).

Almost surely, 2^29720086188 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 29720086188, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39592965888).

29720086188 is an abundant number, since it is smaller than the sum of its proper divisors (49465845588).

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

29720086188 is a wasteful number, since it uses less digits than its factorization.

29720086188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15863 (or 15861 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 51.

The spelling of 29720086188 in words is "twenty-nine billion, seven hundred twenty million, eighty-six thousand, one hundred eighty-eight".