29897047979992 has 64 divisors (see below), whose sum is σ = 61946302763520. Its totient is φ = 13455052098048.

The previous prime is 29897047979989. The next prime is 29897047979999. The reversal of 29897047979992 is 29997974079892.

It is a junction number, because it is equal to n+sod(n) for n = 29897047979897 and 29897047979906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29897047979999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16423803 + ... + 18153109.

It is an arithmetic number, because the mean of its divisors is an integer number (967910980680).

Almost surely, 2^{29897047979992} is an apocalyptic number.

It is an amenable number.

29897047979992 is an abundant number, since it is smaller than the sum of its proper divisors (32049254783528).

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

29897047979992 is a wasteful number, since it uses less digits than its factorization.

29897047979992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1734880 (or 1734876 counting only the distinct ones).

The product of its (nonzero) digits is 23332385664, while the sum is 91.

The spelling of 29897047979992 in words is "twenty-nine trillion, eight hundred ninety-seven billion, forty-seven million, nine hundred seventy-nine thousand, nine hundred ninety-two".