197745128 has 32 divisors (see below), whose sum is σ = 425347200. Its totient is φ = 84426432.

The previous prime is 197745127. The next prime is 197745133. The reversal of 197745128 is 821547791.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (197745127) 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, 8501 + ... + 21627.

It is an arithmetic number, because the mean of its divisors is an integer number (13292100).

Almost surely, 2^197745128 is an apocalyptic number.

It is an amenable number.

197745128 is an abundant number, since it is smaller than the sum of its proper divisors (227602072).

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

197745128 is a wasteful number, since it uses less digits than its factorization.

197745128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13409 (or 13405 counting only the distinct ones).

The product of its digits is 141120, while the sum is 44.

The square root of 197745128 is about 14062.1878809807. The cubic root of 197745128 is about 582.5974741557.

The spelling of 197745128 in words is "one hundred ninety-seven million, seven hundred forty-five thousand, one hundred twenty-eight".