162216728 has 8 divisors (see below), whose sum is σ = 304156380. Its totient is φ = 81108360.

The previous prime is 162216727. The next prime is 162216767. The reversal of 162216728 is 827612261.

162216728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162216721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10138538 + ... + 10138553.

Almost surely, 2^162216728 is an apocalyptic number.

It is an amenable number.

162216728 is a deficient number, since it is larger than the sum of its proper divisors (141939652).

162216728 is a wasteful number, since it uses less digits than its factorization.

162216728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20277097 (or 20277093 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 162216728 is about 12736.4330956512. The cubic root of 162216728 is about 545.3791688501.

Adding to 162216728 its reverse (827612261), we get a palindrome (989828989).

The spelling of 162216728 in words is "one hundred sixty-two million, two hundred sixteen thousand, seven hundred twenty-eight".