29787988212 has 18 divisors (see below), whose sum is σ = 75297414738. Its totient is φ = 9929329392.

The previous prime is 29787988171. The next prime is 29787988249. The reversal of 29787988212 is 21288978792.

It can be written as a sum of positive squares in only one way, i.e., 26100341136 + 3687647076 = 161556^2 + 60726^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 29787988212.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 413722023 + ... + 413722094.

Almost surely, 2^29787988212 is an apocalyptic number.

It is an amenable number.

29787988212 is an abundant number, since it is smaller than the sum of its proper divisors (45509426526).

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

29787988212 is a wasteful number, since it uses less digits than its factorization.

29787988212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827444127 (or 827444122 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 63.

The spelling of 29787988212 in words is "twenty-nine billion, seven hundred eighty-seven million, nine hundred eighty-eight thousand, two hundred twelve".