997272168 has 64 divisors (see below), whose sum is σ = 2599439040. Its totient is φ = 318549504.

The previous prime is 997272161. The next prime is 997272169. The reversal of 997272168 is 861272799.

997272168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 997272168.

It is not an unprimeable number, because it can be changed into a prime (997272161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45580 + ... + 63812.

It is an arithmetic number, because the mean of its divisors is an integer number (40616235).

Almost surely, 2^997272168 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 997272168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1299719520).

997272168 is an abundant number, since it is smaller than the sum of its proper divisors (1602166872).

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

997272168 is a wasteful number, since it uses less digits than its factorization.

997272168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18338 (or 18334 counting only the distinct ones).

The product of its digits is 762048, while the sum is 51.

The square root of 997272168 is about 31579.6163371248. The cubic root of 997272168 is about 999.0898946262.

The spelling of 997272168 in words is "nine hundred ninety-seven million, two hundred seventy-two thousand, one hundred sixty-eight".