28322702181 has 12 divisors (see below), whose sum is σ = 41232701952. Its totient is φ = 18733125096.

The previous prime is 28322702179. The next prime is 28322702197. The reversal of 28322702181 is 18120722382.

It is not a de Polignac number, because 28322702181 - 2¹ = 28322702179 is a prime.

It is a super-2 number, since 2×28322702181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28322702981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12388491 + ... + 12390776.

It is an arithmetic number, because the mean of its divisors is an integer number (3436058496).

Almost surely, 2^28322702181 is an apocalyptic number.

It is an amenable number.

28322702181 is a deficient number, since it is larger than the sum of its proper divisors (12909999771).

28322702181 is a wasteful number, since it uses less digits than its factorization.

28322702181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24779400 (or 24779397 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The spelling of 28322702181 in words is "twenty-eight billion, three hundred twenty-two million, seven hundred two thousand, one hundred eighty-one".