197391960 has 96 divisors (see below), whose sum is σ = 643500000. Its totient is φ = 52475904.

The previous prime is 197391959. The next prime is 197391967. The reversal of 197391960 is 69193791.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197391967) 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, 157416 + ... + 158664.

It is an arithmetic number, because the mean of its divisors is an integer number (6703125).

Almost surely, 2^197391960 is an apocalyptic number.

197391960 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 197391960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (321750000).

197391960 is an abundant number, since it is smaller than the sum of its proper divisors (446108040).

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

197391960 is a wasteful number, since it uses less digits than its factorization.

197391960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1705 (or 1698 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 197391960 is about 14049.6249060251. The cubic root of 197391960 is about 582.2504324872.

The spelling of 197391960 in words is "one hundred ninety-seven million, three hundred ninety-one thousand, nine hundred sixty".