272161728 has 112 divisors (see below), whose sum is σ = 804672000. Its totient is φ = 90203904.

The previous prime is 272161709. The next prime is 272161759. The reversal of 272161728 is 827161272.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 272161692 and 272161701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 412663 + ... + 413321.

Almost surely, 2^272161728 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 272161728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (402336000).

272161728 is an abundant number, since it is smaller than the sum of its proper divisors (532510272).

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

272161728 is a wasteful number, since it uses less digits than its factorization.

272161728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 919 (or 903 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 272161728 is about 16497.3248740516. The cubic root of 272161728 is about 648.0507504833.

The spelling of 272161728 in words is "two hundred seventy-two million, one hundred sixty-one thousand, seven hundred twenty-eight".