197388816 has 40 divisors (see below), whose sum is σ = 511425600. Its totient is φ = 65602176.

The previous prime is 197388803. The next prime is 197388817. The reversal of 197388816 is 618883791.

It is not an unprimeable number, because it can be changed into a prime (197388817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10861 + ... + 22643.

It is an arithmetic number, because the mean of its divisors is an integer number (12785640).

Almost surely, 2^197388816 is an apocalyptic number.

197388816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

197388816 is an abundant number, since it is smaller than the sum of its proper divisors (314036784).

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

197388816 is a wasteful number, since it uses less digits than its factorization.

197388816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12143 (or 12137 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 197388816 is about 14049.5130164714. The cubic root of 197388816 is about 582.2473411673.

The spelling of 197388816 in words is "one hundred ninety-seven million, three hundred eighty-eight thousand, eight hundred sixteen".