28171552722 has 16 divisors (see below), whose sum is σ = 57717328032. Its totient is φ = 9161480480.

The previous prime is 28171552709. The next prime is 28171552741. The reversal of 28171552722 is 22725517182.

It is a happy number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57259008 + ... + 57259499.

It is an arithmetic number, because the mean of its divisors is an integer number (3607333002).

Almost surely, 2^28171552722 is an apocalyptic number.

28171552722 is an abundant number, since it is smaller than the sum of its proper divisors (29545775310).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28171552722 is a wasteful number, since it uses less digits than its factorization.

28171552722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114518553.

The product of its digits is 156800, while the sum is 42.

The spelling of 28171552722 in words is "twenty-eight billion, one hundred seventy-one million, five hundred fifty-two thousand, seven hundred twenty-two".