29428010721 has 16 divisors (see below), whose sum is σ = 45492577920. Its totient is φ = 18765687600.

The previous prime is 29428010707. The next prime is 29428010741. The reversal of 29428010721 is 12701082492.

It is not a de Polignac number, because 29428010721 - 2⁷ = 29428010593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (29428010741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23693430 + ... + 23694671.

It is an arithmetic number, because the mean of its divisors is an integer number (2843286120).

Almost surely, 2^29428010721 is an apocalyptic number.

It is an amenable number.

29428010721 is a deficient number, since it is larger than the sum of its proper divisors (16064567199).

29428010721 is a wasteful number, since it uses less digits than its factorization.

29428010721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47388133 (or 47388127 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 29428010721 in words is "twenty-nine billion, four hundred twenty-eight million, ten thousand, seven hundred twenty-one".