28720216029 has 8 divisors (see below), whose sum is σ = 38294417952. Its totient is φ = 19146412400.

The previous prime is 28720216027. The next prime is 28720216037. The reversal of 28720216029 is 92061202782.

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 28720216029 - 2¹ = 28720216027 is a prime.

It is a super-3 number, since 3×28720216029³ (a number of 32 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28720216027) 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, 184282 + ... + 302324.

It is an arithmetic number, because the mean of its divisors is an integer number (4786802244).

Almost surely, 2^28720216029 is an apocalyptic number.

It is an amenable number.

28720216029 is a deficient number, since it is larger than the sum of its proper divisors (9574201923).

28720216029 is a wasteful number, since it uses less digits than its factorization.

28720216029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199147.

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 28720216029 in words is "twenty-eight billion, seven hundred twenty million, two hundred sixteen thousand, twenty-nine".