29800971728 has 20 divisors (see below), whose sum is σ = 62988417888. Its totient is φ = 13545896160.

The previous prime is 29800971719. The next prime is 29800971737. The reversal of 29800971728 is 82717900892.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (29800971719) and next prime (29800971737).

It is a self number, because there is not a number n which added to its sum of digits gives 29800971728.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84661676 + ... + 84662027.

Almost surely, 2^29800971728 is an apocalyptic number.

It is an amenable number.

29800971728 is an abundant number, since it is smaller than the sum of its proper divisors (33187446160).

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

29800971728 is a wasteful number, since it uses less digits than its factorization.

29800971728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169323722 (or 169323716 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 53.

The spelling of 29800971728 in words is "twenty-nine billion, eight hundred million, nine hundred seventy-one thousand, seven hundred twenty-eight".