28821746729 has 16 divisors (see below), whose sum is σ = 30409271424. Its totient is φ = 27262752000.

The previous prime is 28821746717. The next prime is 28821746731. The reversal of 28821746729 is 92764712882.

It is a cyclic number.

It is not a de Polignac number, because 28821746729 - 2¹² = 28821742633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28821706729) 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, 2039522 + ... + 2053604.

It is an arithmetic number, because the mean of its divisors is an integer number (1900579464).

Almost surely, 2^28821746729 is an apocalyptic number.

It is an amenable number.

28821746729 is a deficient number, since it is larger than the sum of its proper divisors (1587524695).

28821746729 is a wasteful number, since it uses less digits than its factorization.

28821746729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15088.

The product of its digits is 5419008, while the sum is 56.

The spelling of 28821746729 in words is "twenty-eight billion, eight hundred twenty-one million, seven hundred forty-six thousand, seven hundred twenty-nine".