28318165722 has 48 divisors (see below), whose sum is σ = 76495828032. Its totient is φ = 7355367360.

The previous prime is 28318165691. The next prime is 28318165723. The reversal of 28318165722 is 22756181382.

It is not an unprimeable number, because it can be changed into a prime (28318165723) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10214403 + ... + 10217174.

It is an arithmetic number, because the mean of its divisors is an integer number (1593663084).

Almost surely, 2^28318165722 is an apocalyptic number.

28318165722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28318165722 is an abundant number, since it is smaller than the sum of its proper divisors (48177662310).

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

28318165722 is a wasteful number, since it uses less digits than its factorization.

28318165722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20431603 (or 20431600 counting only the distinct ones).

The product of its digits is 322560, while the sum is 45.

The spelling of 28318165722 in words is "twenty-eight billion, three hundred eighteen million, one hundred sixty-five thousand, seven hundred twenty-two".