197128156 has 24 divisors (see below), whose sum is σ = 355844160. Its totient is φ = 95481792.

The previous prime is 197128117. The next prime is 197128157. The reversal of 197128156 is 651821791.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197128157) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32586 + ... + 38158.

It is an arithmetic number, because the mean of its divisors is an integer number (14826840).

Almost surely, 2^197128156 is an apocalyptic number.

It is an amenable number.

197128156 is a deficient number, since it is larger than the sum of its proper divisors (158716004).

197128156 is a wasteful number, since it uses less digits than its factorization.

197128156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5853 (or 5851 counting only the distinct ones).

The product of its digits is 30240, while the sum is 40.

The square root of 197128156 is about 14040.2334738422. The cubic root of 197128156 is about 581.9909344644.

The spelling of 197128156 in words is "one hundred ninety-seven million, one hundred twenty-eight thousand, one hundred fifty-six".