197900728338368 has 84 divisors (see below), whose sum is σ = 445580006187456. Its totient is φ = 87053106201600.

The previous prime is 197900728338317. The next prime is 197900728338403. The reversal of 197900728338368 is 863833827009791.

It is a junction number, because it is equal to n+sod(n) for n = 197900728338295 and 197900728338304.

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, 411943205 + ... + 412423332.

It is an arithmetic number, because the mean of its divisors is an integer number (5304523883184).

Almost surely, 2^{197900728338368} is an apocalyptic number.

It is an amenable number.

197900728338368 is an abundant number, since it is smaller than the sum of its proper divisors (247679277849088).

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

197900728338368 is a wasteful number, since it uses less digits than its factorization.

197900728338368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824366602 (or 824366581 counting only the distinct ones).

The product of its (nonzero) digits is 658409472, while the sum is 74.

The spelling of 197900728338368 in words is "one hundred ninety-seven trillion, nine hundred billion, seven hundred twenty-eight million, three hundred thirty-eight thousand, three hundred sixty-eight".