29861430172 has 90 divisors (see below), whose sum is σ = 64022016968. Its totient is φ = 11938354176.

The previous prime is 29861430163. The next prime is 29861430191. The reversal of 29861430172 is 27103416892.

It is a congruent number.

It is an unprimeable number.

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 29 ways as a sum of consecutive naturals, for example, 264260388 + ... + 264260500.

Almost surely, 2^29861430172 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 29861430172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32011008484).

29861430172 is an abundant number, since it is smaller than the sum of its proper divisors (34160586796).

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

29861430172 is an frugal number, since it uses more digits than its factorization.

29861430172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 29861430172 in words is "twenty-nine billion, eight hundred sixty-one million, four hundred thirty thousand, one hundred seventy-two".