28278228329 has 8 divisors (see below), whose sum is σ = 30455803392. Its totient is φ = 26100985680.

The previous prime is 28278228323. The next prime is 28278228353. The reversal of 28278228329 is 92382287282.

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 28278228329 - 2⁴ = 28278228313 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28278228323) 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, 110264 + ... + 262134.

It is an arithmetic number, because the mean of its divisors is an integer number (3806975424).

Almost surely, 2^28278228329 is an apocalyptic number.

It is an amenable number.

28278228329 is a deficient number, since it is larger than the sum of its proper divisors (2177575063).

28278228329 is a wasteful number, since it uses less digits than its factorization.

28278228329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166207.

The product of its digits is 3096576, while the sum is 53.

The spelling of 28278228329 in words is "twenty-eight billion, two hundred seventy-eight million, two hundred twenty-eight thousand, three hundred twenty-nine".