197297320 has 64 divisors (see below), whose sum is σ = 497404800. Its totient is φ = 69799680.

The previous prime is 197297279. The next prime is 197297329. The reversal of 197297320 is 23792791.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (197297329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10221 + ... + 22339.

It is an arithmetic number, because the mean of its divisors is an integer number (7771950).

Almost surely, 2^197297320 is an apocalyptic number.

197297320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197297320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248702400).

197297320 is an abundant number, since it is smaller than the sum of its proper divisors (300107480).

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

197297320 is a wasteful number, since it uses less digits than its factorization.

197297320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12178 (or 12174 counting only the distinct ones).

The product of its (nonzero) digits is 47628, while the sum is 40.

The square root of 197297320 is about 14046.2564407745. The cubic root of 197297320 is about 582.1573638707.

The spelling of 197297320 in words is "one hundred ninety-seven million, two hundred ninety-seven thousand, three hundred twenty".