29978925072 has 80 divisors (see below), whose sum is σ = 79334975808. Its totient is φ = 9749698560.

The previous prime is 29978925071. The next prime is 29978925133. The reversal of 29978925072 is 27052987992.

It is a junction number, because it is equal to n+sod(n) for n = 29978924997 and 29978925015.

It is not an unprimeable number, because it can be changed into a prime (29978925071) 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, 1959372 + ... + 1974612.

Almost surely, 2^29978925072 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 29978925072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39667487904).

29978925072 is an abundant number, since it is smaller than the sum of its proper divisors (49356050736).

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

29978925072 is a wasteful number, since it uses less digits than its factorization.

29978925072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16248 (or 16242 counting only the distinct ones).

The product of its (nonzero) digits is 11430720, while the sum is 60.

The spelling of 29978925072 in words is "twenty-nine billion, nine hundred seventy-eight million, nine hundred twenty-five thousand, seventy-two".