197913720 has 64 divisors (see below), whose sum is σ = 597780000. Its totient is φ = 52418048.

The previous prime is 197913679. The next prime is 197913721. The reversal of 197913720 is 27319791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197913721) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12346 + ... + 23414.

Almost surely, 2^197913720 is an apocalyptic number.

197913720 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 197913720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (298890000).

197913720 is an abundant number, since it is smaller than the sum of its proper divisors (399866280).

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

197913720 is a wasteful number, since it uses less digits than its factorization.

197913720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11232 (or 11228 counting only the distinct ones).

The product of its (nonzero) digits is 23814, while the sum is 39.

The square root of 197913720 is about 14068.1811191070. The cubic root of 197913720 is about 582.7629959294.

The spelling of 197913720 in words is "one hundred ninety-seven million, nine hundred thirteen thousand, seven hundred twenty".