28115162705 has 16 divisors (see below), whose sum is σ = 38679586560. Its totient is φ = 19218144192.

The previous prime is 28115162653. The next prime is 28115162707. The reversal of 28115162705 is 50726151182.

It is a cyclic number.

It is not a de Polignac number, because 28115162705 - 2¹⁰ = 28115161681 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28115162707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1255925 + ... + 1278114.

It is an arithmetic number, because the mean of its divisors is an integer number (2417474160).

Almost surely, 2^28115162705 is an apocalyptic number.

It is an amenable number.

28115162705 is a deficient number, since it is larger than the sum of its proper divisors (10564423855).

28115162705 is a wasteful number, since it uses less digits than its factorization.

28115162705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2534368.

The product of its (nonzero) digits is 33600, while the sum is 38.

The spelling of 28115162705 in words is "twenty-eight billion, one hundred fifteen million, one hundred sixty-two thousand, seven hundred five".