197289940 has 12 divisors (see below), whose sum is σ = 414308916. Its totient is φ = 78915968.

The previous prime is 197289931. The next prime is 197289941. The reversal of 197289940 is 49982791.

197289940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 25522704 + 171767236 = 5052^2 + 13106^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197289941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4932229 + ... + 4932268.

It is an arithmetic number, because the mean of its divisors is an integer number (34525743).

Almost surely, 2^197289940 is an apocalyptic number.

197289940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197289940 is an abundant number, since it is smaller than the sum of its proper divisors (217018976).

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

197289940 is a wasteful number, since it uses less digits than its factorization.

197289940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9864506 (or 9864504 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 49.

The square root of 197289940 is about 14045.9937348697. The cubic root of 197289940 is about 582.1501051559.

The spelling of 197289940 in words is "one hundred ninety-seven million, two hundred eighty-nine thousand, nine hundred forty".