161027328 has 216 divisors, whose sum is σ = 545257440. Its totient is φ = 41717760.

The previous prime is 161027327. The next prime is 161027329. The reversal of 161027328 is 823720161.

It is an interprime number because it is at equal distance from previous prime (161027327) and next prime (161027329).

It is a junction number, because it is equal to n+sod(n) for n = 161027295 and 161027304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161027323) 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, 413758 + ... + 414146.

It is an arithmetic number, because the mean of its divisors is an integer number (2524340).

Almost surely, 2^161027328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161027328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272628720).

161027328 is an abundant number, since it is smaller than the sum of its proper divisors (384230112).

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

161027328 is a wasteful number, since it uses less digits than its factorization.

161027328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433 (or 412 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 161027328 is about 12689.6543688156. The cubic root of 161027328 is about 544.0429608517.

Adding to 161027328 its reverse (823720161), we get a palindrome (984747489).

The spelling of 161027328 in words is "one hundred sixty-one million, twenty-seven thousand, three hundred twenty-eight".