29420689728 has 56 divisors (see below), whose sum is σ = 77917690240. Its totient is φ = 9797391360.

The previous prime is 29420689723. The next prime is 29420689763. The reversal of 29420689728 is 82798602492.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29420689721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125748 + ... + 273228.

Almost surely, 2^29420689728 is an apocalyptic number.

It is an amenable number.

29420689728 is an abundant number, since it is smaller than the sum of its proper divisors (48497000512).

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

29420689728 is a wasteful number, since it uses less digits than its factorization.

29420689728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148535 (or 148525 counting only the distinct ones).

The product of its (nonzero) digits is 6967296, while the sum is 57.

The spelling of 29420689728 in words is "twenty-nine billion, four hundred twenty million, six hundred eighty-nine thousand, seven hundred twenty-eight".