197971428 has 12 divisors (see below), whose sum is σ = 461933360. Its totient is φ = 65990472.

The previous prime is 197971427. The next prime is 197971447. The reversal of 197971428 is 824179791.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (197971427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8248798 + ... + 8248821.

Almost surely, 2^197971428 is an apocalyptic number.

It is an amenable number.

197971428 is an abundant number, since it is smaller than the sum of its proper divisors (263961932).

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

197971428 is a wasteful number, since it uses less digits than its factorization.

197971428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16497626 (or 16497624 counting only the distinct ones).

The product of its digits is 254016, while the sum is 48.

The square root of 197971428 is about 14070.2319810300. The cubic root of 197971428 is about 582.8196314149.

The spelling of 197971428 in words is "one hundred ninety-seven million, nine hundred seventy-one thousand, four hundred twenty-eight".