29724122868 has 72 divisors (see below), whose sum is σ = 76326746496. Its totient is φ = 8996423040.

The previous prime is 29724122867. The next prime is 29724122881. The reversal of 29724122868 is 86822142792.

It is a self number, because there is not a number n which added to its sum of digits gives 29724122868.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29724122867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1232421 + ... + 1256307.

Almost surely, 2^29724122868 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 29724122868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38163373248).

29724122868 is an abundant number, since it is smaller than the sum of its proper divisors (46602623628).

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

29724122868 is a wasteful number, since it uses less digits than its factorization.

29724122868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24773 (or 24760 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 51.

The spelling of 29724122868 in words is "twenty-nine billion, seven hundred twenty-four million, one hundred twenty-two thousand, eight hundred sixty-eight".