197242838 has 16 divisors (see below), whose sum is σ = 335393520. Its totient is φ = 86243616.

The previous prime is 197242817. The next prime is 197242847. The reversal of 197242838 is 838242791.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199145 + ... + 200132.

It is an arithmetic number, because the mean of its divisors is an integer number (20962095).

Almost surely, 2^197242838 is an apocalyptic number.

197242838 is a deficient number, since it is larger than the sum of its proper divisors (138150682).

197242838 is a wasteful number, since it uses less digits than its factorization.

197242838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399311.

The product of its digits is 193536, while the sum is 44.

The square root of 197242838 is about 14044.3169289218. The cubic root of 197242838 is about 582.1037729799.

The spelling of 197242838 in words is "one hundred ninety-seven million, two hundred forty-two thousand, eight hundred thirty-eight".