197538128 has 10 divisors (see below), whose sum is σ = 382730154. Its totient is φ = 98769056.

The previous prime is 197538127. The next prime is 197538139. The reversal of 197538128 is 821835791.

It can be written as a sum of positive squares in only one way, i.e., 183006784 + 14531344 = 13528^2 + 3812^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197538127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6173051 + ... + 6173082.

Almost surely, 2^197538128 is an apocalyptic number.

It is an amenable number.

197538128 is a deficient number, since it is larger than the sum of its proper divisors (185192026).

197538128 is a wasteful number, since it uses less digits than its factorization.

197538128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12346141 (or 12346135 counting only the distinct ones).

The product of its digits is 120960, while the sum is 44.

The square root of 197538128 is about 14054.8257904536. The cubic root of 197538128 is about 582.3941151088.

The spelling of 197538128 in words is "one hundred ninety-seven million, five hundred thirty-eight thousand, one hundred twenty-eight".