28789410721 has 8 divisors (see below), whose sum is σ = 28827886464. Its totient is φ = 28750959600.

The previous prime is 28789410719. The next prime is 28789410731. The reversal of 28789410721 is 12701498782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28789410721 - 2¹ = 28789410719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28789410731) 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, 3637050 + ... + 3644956.

It is an arithmetic number, because the mean of its divisors is an integer number (3603485808).

Almost surely, 2^28789410721 is an apocalyptic number.

It is an amenable number.

28789410721 is a deficient number, since it is larger than the sum of its proper divisors (38475743).

28789410721 is a wasteful number, since it uses less digits than its factorization.

28789410721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12311.

The product of its (nonzero) digits is 451584, while the sum is 49.

The spelling of 28789410721 in words is "twenty-eight billion, seven hundred eighty-nine million, four hundred ten thousand, seven hundred twenty-one".