28161168330 has 64 divisors (see below), whose sum is σ = 70145792640. Its totient is φ = 7227005184.

The previous prime is 28161168311. The next prime is 28161168379. The reversal of 28161168330 is 3386116182.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214372 + ... + 319808.

It is an arithmetic number, because the mean of its divisors is an integer number (1096028010).

Almost surely, 2^28161168330 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28161168330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35072896320).

28161168330 is an abundant number, since it is smaller than the sum of its proper divisors (41984624310).

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

28161168330 is a wasteful number, since it uses less digits than its factorization.

28161168330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105783.

The product of its (nonzero) digits is 41472, while the sum is 39.

The spelling of 28161168330 in words is "twenty-eight billion, one hundred sixty-one million, one hundred sixty-eight thousand, three hundred thirty".