197897920 has 168 divisors, whose sum is σ = 547268400. Its totient is φ = 67921920.

The previous prime is 197897899. The next prime is 197897927. The reversal of 197897920 is 29798791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197897927) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 735546 + ... + 735814.

It is an arithmetic number, because the mean of its divisors is an integer number (3257550).

Almost surely, 2^197897920 is an apocalyptic number.

197897920 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 197897920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273634200).

197897920 is an abundant number, since it is smaller than the sum of its proper divisors (349370480).

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

197897920 is a wasteful number, since it uses less digits than its factorization.

197897920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 52.

The square root of 197897920 is about 14067.6195569826. The cubic root of 197897920 is about 582.7474876558.

The spelling of 197897920 in words is "one hundred ninety-seven million, eight hundred ninety-seven thousand, nine hundred twenty".