28915329729 has 32 divisors (see below), whose sum is σ = 45565277184. Its totient is φ = 16079503680.

The previous prime is 28915329719. The next prime is 28915329749. The reversal of 28915329729 is 92792351982.

It is not a de Polignac number, because 28915329729 - 2⁴ = 28915329713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28915329719) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130159 + ... + 273444.

It is an arithmetic number, because the mean of its divisors is an integer number (1423914912).

Almost surely, 2^28915329729 is an apocalyptic number.

It is an amenable number.

28915329729 is a deficient number, since it is larger than the sum of its proper divisors (16649947455).

28915329729 is a wasteful number, since it uses less digits than its factorization.

28915329729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403797.

The product of its digits is 4898880, while the sum is 57.

The spelling of 28915329729 in words is "twenty-eight billion, nine hundred fifteen million, three hundred twenty-nine thousand, seven hundred twenty-nine".