197871738 has 32 divisors (see below), whose sum is σ = 441080640. Its totient is φ = 58809600.

The previous prime is 197871689. The next prime is 197871743. The reversal of 197871738 is 837178791.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49113 + ... + 52988.

It is an arithmetic number, because the mean of its divisors is an integer number (13783770).

Almost surely, 2^197871738 is an apocalyptic number.

197871738 is an abundant number, since it is smaller than the sum of its proper divisors (243208902).

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

197871738 is a wasteful number, since it uses less digits than its factorization.

197871738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102142.

The product of its digits is 592704, while the sum is 51.

The square root of 197871738 is about 14066.6889494294. The cubic root of 197871738 is about 582.7217872549.

The spelling of 197871738 in words is "one hundred ninety-seven million, eight hundred seventy-one thousand, seven hundred thirty-eight".