197972028 has 36 divisors (see below), whose sum is σ = 501301528. Its totient is φ = 65875680.

The previous prime is 197972003. The next prime is 197972051. The reversal of 197972028 is 820279791.

197972028 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17583 + ... + 26553.

Almost surely, 2^197972028 is an apocalyptic number.

197972028 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

197972028 is an abundant number, since it is smaller than the sum of its proper divisors (303329500).

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

197972028 is a wasteful number, since it uses less digits than its factorization.

197972028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9594 (or 9589 counting only the distinct ones).

The product of its (nonzero) digits is 127008, while the sum is 45.

The square root of 197972028 is about 14070.2533026239. The cubic root of 197972028 is about 582.8202202060.

The spelling of 197972028 in words is "one hundred ninety-seven million, nine hundred seventy-two thousand, twenty-eight".