197238816 has 36 divisors (see below), whose sum is σ = 560898702. Its totient is φ = 65746176.

The previous prime is 197238809. The next prime is 197238827. The reversal of 197238816 is 618832791.

It can be written as a sum of positive squares in only one way, i.e., 123210000 + 74028816 = 11100^2 + 8604^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 342141 + ... + 342716.

Almost surely, 2^197238816 is an apocalyptic number.

197238816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

197238816 is an abundant number, since it is smaller than the sum of its proper divisors (363659886).

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

197238816 is a wasteful number, since it uses less digits than its factorization.

197238816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684873 (or 684862 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The square root of 197238816 is about 14044.1737386006. The cubic root of 197238816 is about 582.0998163727.

The spelling of 197238816 in words is "one hundred ninety-seven million, two hundred thirty-eight thousand, eight hundred sixteen".