197161440 has 96 divisors (see below), whose sum is σ = 709793280. Its totient is φ = 45064704.

The previous prime is 197161429. The next prime is 197161453. The reversal of 197161440 is 44161791.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25980 + ... + 32699.

It is an arithmetic number, because the mean of its divisors is an integer number (7393680).

Almost surely, 2^197161440 is an apocalyptic number.

197161440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197161440 is an abundant number, since it is smaller than the sum of its proper divisors (512631840).

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

197161440 is a wasteful number, since it uses less digits than its factorization.

197161440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58704 (or 58696 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 33.

The square root of 197161440 is about 14041.4187317379. The cubic root of 197161440 is about 582.0236879389.

The spelling of 197161440 in words is "one hundred ninety-seven million, one hundred sixty-one thousand, four hundred forty".