161928272 has 40 divisors (see below), whose sum is σ = 344120832. Its totient is φ = 73203200.

The previous prime is 161928253. The next prime is 161928289. The reversal of 161928272 is 272829161.

161928272 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent 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, 31208 + ... + 36024.

Almost surely, 2^161928272 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 161928272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172060416).

161928272 is an abundant number, since it is smaller than the sum of its proper divisors (182192560).

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

161928272 is a wasteful number, since it uses less digits than its factorization.

161928272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5027 (or 5021 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 161928272 is about 12725.1040074335. The cubic root of 161928272 is about 545.0557101539.

The spelling of 161928272 in words is "one hundred sixty-one million, nine hundred twenty-eight thousand, two hundred seventy-two".