28163256307 has 8 divisors (see below), whose sum is σ = 29011633200. Its totient is φ = 27323671200.

The previous prime is 28163256287. The next prime is 28163256311. The reversal of 28163256307 is 70365236182.

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 28163256307 - 2²⁷ = 28029038579 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28163256007) 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, 2191444 + ... + 2204257.

It is an arithmetic number, because the mean of its divisors is an integer number (3626454150).

Almost surely, 2^28163256307 is an apocalyptic number.

28163256307 is a deficient number, since it is larger than the sum of its proper divisors (848376893).

28163256307 is a wasteful number, since it uses less digits than its factorization.

28163256307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4395893.

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 28163256307 in words is "twenty-eight billion, one hundred sixty-three million, two hundred fifty-six thousand, three hundred seven".