197938071800 has 192 divisors, whose sum is σ = 538145467200. Its totient is φ = 66301747200.

The previous prime is 197938071743. The next prime is 197938071823. The reversal of 197938071800 is 8170839791.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17876666 + ... + 17887734.

It is an arithmetic number, because the mean of its divisors is an integer number (2802840975).

Almost surely, 2^197938071800 is an apocalyptic number.

197938071800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197938071800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269072733600).

197938071800 is an abundant number, since it is smaller than the sum of its proper divisors (340207395400).

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

197938071800 is a wasteful number, since it uses less digits than its factorization.

197938071800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11386 (or 11377 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 53.

The spelling of 197938071800 in words is "one hundred ninety-seven billion, nine hundred thirty-eight million, seventy-one thousand, eight hundred".