28158522747 has 64 divisors (see below), whose sum is σ = 44000755200. Its totient is φ = 15895111680.

The previous prime is 28158522719. The next prime is 28158522787. The reversal of 28158522747 is 74722585182.

It is not a de Polignac number, because 28158522747 - 2¹⁰ = 28158521723 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 28158522747.

It is not an unprimeable number, because it can be changed into a prime (28158522787) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1705948 + ... + 1722374.

It is an arithmetic number, because the mean of its divisors is an integer number (687511800).

Almost surely, 2^28158522747 is an apocalyptic number.

28158522747 is a deficient number, since it is larger than the sum of its proper divisors (15842232453).

28158522747 is a wasteful number, since it uses less digits than its factorization.

28158522747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16556.

The product of its digits is 2508800, while the sum is 51.

The spelling of 28158522747 in words is "twenty-eight billion, one hundred fifty-eight million, five hundred twenty-two thousand, seven hundred forty-seven".